ACPR/android_system_core
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
android_system_core/libpixelflinger/scanline.cpp
David 'Digit' Turner 39764f41a5 pixelflinger: Provide more scanline shortcut functions. 
This patch adds a dozen more "shortcut" scanline-processing functions
to pixel-flingers. All of them avoid using the JIT for the corresponding
operation (on ARM), or using the generic and _extremely_ slow 'scanline'
function (on x86, where there is no JIT).

The shortcuts were selected by running the system under emulation
(build full_x86-eng, then launch emulator-x86), and correspond to
operations that are in use when using the system's typical UI features.

This makes it much more responsive and amenable to testing most
applications, at least those that don't use OpenGL ES heavily.

Note that HW OpenGLES emulation is under completion and should solve this
problem entirely, though is not there yet.

Change-Id: I9c73ba21ad158d6cc5532fabe7ed2419e00ecb3f
2011-04-16 13:13:58 +02:00

2322 lines
75 KiB
C++
Raw Blame History

/* libs/pixelflinger/scanline.cpp
**
** Copyright 2006-2011, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#define LOG_TAG "pixelflinger"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <cutils/memory.h>
#include <cutils/log.h>
#include "buffer.h"
#include "scanline.h"
#include "codeflinger/CodeCache.h"
#include "codeflinger/GGLAssembler.h"
#include "codeflinger/ARMAssembler.h"
//#include "codeflinger/ARMAssemblerOptimizer.h"
// ----------------------------------------------------------------------------
#define ANDROID_CODEGEN_GENERIC 0 // force generic pixel pipeline
#define ANDROID_CODEGEN_C 1 // hand-written C, fallback generic
#define ANDROID_CODEGEN_ASM 2 // hand-written asm, fallback generic
#define ANDROID_CODEGEN_GENERATED 3 // hand-written asm, fallback codegen
#ifdef NDEBUG
# define ANDROID_RELEASE
# define ANDROID_CODEGEN ANDROID_CODEGEN_GENERATED
#else
# define ANDROID_DEBUG
# define ANDROID_CODEGEN ANDROID_CODEGEN_GENERATED
#endif
#if defined(__arm__)
# define ANDROID_ARM_CODEGEN 1
#else
# define ANDROID_ARM_CODEGEN 0
#endif
#define DEBUG__CODEGEN_ONLY 0
/* Set to 1 to dump to the log the states that need a new
* code-generated scanline callback, i.e. those that don't
* have a corresponding shortcut function.
*/
#define DEBUG_NEEDS 0
#define ASSEMBLY_SCRATCH_SIZE 2048
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
static void init_y(context_t*, int32_t);
static void init_y_noop(context_t*, int32_t);
static void init_y_packed(context_t*, int32_t);
static void init_y_error(context_t*, int32_t);
static void step_y__generic(context_t* c);
static void step_y__nop(context_t*);
static void step_y__smooth(context_t* c);
static void step_y__tmu(context_t* c);
static void step_y__w(context_t* c);
static void scanline(context_t* c);
static void scanline_perspective(context_t* c);
static void scanline_perspective_single(context_t* c);
static void scanline_t32cb16blend(context_t* c);
static void scanline_t32cb16blend_dither(context_t* c);
static void scanline_t32cb16blend_srca(context_t* c);
static void scanline_t32cb16blend_clamp(context_t* c);
static void scanline_t32cb16blend_clamp_dither(context_t* c);
static void scanline_t32cb16blend_clamp_mod(context_t* c);
static void scanline_x32cb16blend_clamp_mod(context_t* c);
static void scanline_t32cb16blend_clamp_mod_dither(context_t* c);
static void scanline_x32cb16blend_clamp_mod_dither(context_t* c);
static void scanline_t32cb16(context_t* c);
static void scanline_t32cb16_dither(context_t* c);
static void scanline_t32cb16_clamp(context_t* c);
static void scanline_t32cb16_clamp_dither(context_t* c);
static void scanline_col32cb16blend(context_t* c);
static void scanline_t16cb16_clamp(context_t* c);
static void scanline_t16cb16blend_clamp_mod(context_t* c);
static void scanline_memcpy(context_t* c);
static void scanline_memset8(context_t* c);
static void scanline_memset16(context_t* c);
static void scanline_memset32(context_t* c);
static void scanline_noop(context_t* c);
static void scanline_set(context_t* c);
static void scanline_clear(context_t* c);
static void rect_generic(context_t* c, size_t yc);
static void rect_memcpy(context_t* c, size_t yc);
extern "C" void scanline_t32cb16blend_arm(uint16_t*, uint32_t*, size_t);
extern "C" void scanline_t32cb16_arm(uint16_t *dst, uint32_t *src, size_t ct);
extern "C" void scanline_col32cb16blend_neon(uint16_t *dst, uint32_t *col, size_t ct);
extern "C" void scanline_col32cb16blend_arm(uint16_t *dst, uint32_t col, size_t ct);
// ----------------------------------------------------------------------------
static inline uint16_t convertAbgr8888ToRgb565(uint32_t pix)
{
return uint16_t( ((pix << 8) & 0xf800) |
((pix >> 5) & 0x07e0) |
((pix >> 19) & 0x001f) );
}
struct shortcut_t {
needs_filter_t filter;
const char* desc;
void (*scanline)(context_t*);
void (*init_y)(context_t*, int32_t);
};
// Keep in sync with needs
/* To understand the values here, have a look at:
* system/core/include/private/pixelflinger/ggl_context.h
*
* Especially the lines defining and using GGL_RESERVE_NEEDS
*
* Quick reminders:
* - the last nibble of the first value is the destination buffer format.
* - the last nibble of the third value is the source texture format
* - formats: 4=rgb565 1=abgr8888 2=xbgr8888
*
* In the descriptions below:
*
* SRC means we copy the source pixels to the destination
*
* SRC_OVER means we blend the source pixels to the destination
* with dstFactor = 1-srcA, srcFactor=1 (premultiplied source).
* This mode is otherwise called 'blend'.
*
* SRCA_OVER means we blend the source pixels to the destination
* with dstFactor=srcA*(1-srcA) srcFactor=srcA (non-premul source).
* This mode is otherwise called 'blend_srca'
*
* clamp means we fetch source pixels from a texture with u/v clamping
*
* mod means the source pixels are modulated (multiplied) by the
* a/r/g/b of the current context's color. Typically used for
* fade-in / fade-out.
*
* dither means we dither 32 bit values to 16 bits
*/
static shortcut_t shortcuts[] = {
{ { { 0x03515104, 0x00000077, { 0x00000A01, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, blend SRC_OVER", scanline_t32cb16blend, init_y_noop },
{ { { 0x03010104, 0x00000077, { 0x00000A01, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, SRC", scanline_t32cb16, init_y_noop },
/* same as first entry, but with dithering */
{ { { 0x03515104, 0x00000177, { 0x00000A01, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, blend SRC_OVER dither", scanline_t32cb16blend_dither, init_y_noop },
/* same as second entry, but with dithering */
{ { { 0x03010104, 0x00000177, { 0x00000A01, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, SRC dither", scanline_t32cb16_dither, init_y_noop },
/* this is used during the boot animation - CHEAT: ignore dithering */
{ { { 0x03545404, 0x00000077, { 0x00000A01, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFEFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, blend dst:ONE_MINUS_SRCA src:SRCA", scanline_t32cb16blend_srca, init_y_noop },
/* special case for arbitrary texture coordinates (think scaling) */
{ { { 0x03515104, 0x00000077, { 0x00000001, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, SRC_OVER clamp", scanline_t32cb16blend_clamp, init_y },
{ { { 0x03515104, 0x00000177, { 0x00000001, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, SRC_OVER clamp dither", scanline_t32cb16blend_clamp_dither, init_y },
/* another case used during emulation */
{ { { 0x03515104, 0x00000077, { 0x00001001, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, SRC_OVER clamp modulate", scanline_t32cb16blend_clamp_mod, init_y },
/* and this */
{ { { 0x03515104, 0x00000077, { 0x00001002, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, x888 tx, SRC_OVER clamp modulate", scanline_x32cb16blend_clamp_mod, init_y },
{ { { 0x03515104, 0x00000177, { 0x00001001, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, SRC_OVER clamp modulate dither", scanline_t32cb16blend_clamp_mod_dither, init_y },
{ { { 0x03515104, 0x00000177, { 0x00001002, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, x888 tx, SRC_OVER clamp modulate dither", scanline_x32cb16blend_clamp_mod_dither, init_y },
{ { { 0x03010104, 0x00000077, { 0x00000001, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, SRC clamp", scanline_t32cb16_clamp, init_y },
{ { { 0x03010104, 0x00000077, { 0x00000002, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, x888 tx, SRC clamp", scanline_t32cb16_clamp, init_y },
{ { { 0x03010104, 0x00000177, { 0x00000001, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 8888 tx, SRC clamp dither", scanline_t32cb16_clamp_dither, init_y },
{ { { 0x03010104, 0x00000177, { 0x00000002, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, x888 tx, SRC clamp dither", scanline_t32cb16_clamp_dither, init_y },
{ { { 0x03010104, 0x00000077, { 0x00000004, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 565 tx, SRC clamp", scanline_t16cb16_clamp, init_y },
{ { { 0x03515104, 0x00000077, { 0x00001004, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0x0000003F } } },
"565 fb, 565 tx, SRC_OVER clamp", scanline_t16cb16blend_clamp_mod, init_y },
{ { { 0x03515104, 0x00000077, { 0x00000000, 0x00000000 } },
{ 0xFFFFFFFF, 0xFFFFFFFF, { 0xFFFFFFFF, 0xFFFFFFFF } } },
"565 fb, 8888 fixed color", scanline_col32cb16blend, init_y_packed },
{ { { 0x00000000, 0x00000000, { 0x00000000, 0x00000000 } },
{ 0x00000000, 0x00000007, { 0x00000000, 0x00000000 } } },
"(nop) alpha test", scanline_noop, init_y_noop },
{ { { 0x00000000, 0x00000000, { 0x00000000, 0x00000000 } },
{ 0x00000000, 0x00000070, { 0x00000000, 0x00000000 } } },
"(nop) depth test", scanline_noop, init_y_noop },
{ { { 0x05000000, 0x00000000, { 0x00000000, 0x00000000 } },
{ 0x0F000000, 0x00000080, { 0x00000000, 0x00000000 } } },
"(nop) logic_op", scanline_noop, init_y_noop },
{ { { 0xF0000000, 0x00000000, { 0x00000000, 0x00000000 } },
{ 0xF0000000, 0x00000080, { 0x00000000, 0x00000000 } } },
"(nop) color mask", scanline_noop, init_y_noop },
{ { { 0x0F000000, 0x00000077, { 0x00000000, 0x00000000 } },
{ 0xFF000000, 0x000000F7, { 0x00000000, 0x00000000 } } },
"(set) logic_op", scanline_set, init_y_noop },
{ { { 0x00000000, 0x00000077, { 0x00000000, 0x00000000 } },
{ 0xFF000000, 0x000000F7, { 0x00000000, 0x00000000 } } },
"(clear) logic_op", scanline_clear, init_y_noop },
{ { { 0x03000000, 0x00000077, { 0x00000000, 0x00000000 } },
{ 0xFFFFFF00, 0x000000F7, { 0x00000000, 0x00000000 } } },
"(clear) blending 0/0", scanline_clear, init_y_noop },
{ { { 0x00000000, 0x00000000, { 0x00000000, 0x00000000 } },
{ 0x0000003F, 0x00000000, { 0x00000000, 0x00000000 } } },
"(error) invalid color-buffer format", scanline_noop, init_y_error },
};
static const needs_filter_t noblend1to1 = {
// (disregard dithering, see below)
{ 0x03010100, 0x00000077, { 0x00000A00, 0x00000000 } },
{ 0xFFFFFFC0, 0xFFFFFEFF, { 0xFFFFFFC0, 0x0000003F } }
};
static const needs_filter_t fill16noblend = {
{ 0x03010100, 0x00000077, { 0x00000000, 0x00000000 } },
{ 0xFFFFFFC0, 0xFFFFFFFF, { 0x0000003F, 0x0000003F } }
};
// ----------------------------------------------------------------------------
#if ANDROID_ARM_CODEGEN
static CodeCache gCodeCache(12 * 1024);
class ScanlineAssembly : public Assembly {
AssemblyKey<needs_t> mKey;
public:
ScanlineAssembly(needs_t needs, size_t size)
: Assembly(size), mKey(needs) { }
const AssemblyKey<needs_t>& key() const { return mKey; }
};
#endif
// ----------------------------------------------------------------------------
void ggl_init_scanline(context_t* c)
{
c->init_y = init_y;
c->step_y = step_y__generic;
c->scanline = scanline;
}
void ggl_uninit_scanline(context_t* c)
{
if (c->state.buffers.coverage)
free(c->state.buffers.coverage);
#if ANDROID_ARM_CODEGEN
if (c->scanline_as)
c->scanline_as->decStrong(c);
#endif
}
// ----------------------------------------------------------------------------
static void pick_scanline(context_t* c)
{
#if (!defined(DEBUG__CODEGEN_ONLY) || (DEBUG__CODEGEN_ONLY == 0))
#if ANDROID_CODEGEN == ANDROID_CODEGEN_GENERIC
c->init_y = init_y;
c->step_y = step_y__generic;
c->scanline = scanline;
return;
#endif
//printf("*** needs [%08lx:%08lx:%08lx:%08lx]\n",
// c->state.needs.n, c->state.needs.p,
// c->state.needs.t[0], c->state.needs.t[1]);
// first handle the special case that we cannot test with a filter
const uint32_t cb_format = GGL_READ_NEEDS(CB_FORMAT, c->state.needs.n);
if (GGL_READ_NEEDS(T_FORMAT, c->state.needs.t[0]) == cb_format) {
if (c->state.needs.match(noblend1to1)) {
// this will match regardless of dithering state, since both
// src and dest have the same format anyway, there is no dithering
// to be done.
const GGLFormat* f =
&(c->formats[GGL_READ_NEEDS(T_FORMAT, c->state.needs.t[0])]);
if ((f->components == GGL_RGB) ||
(f->components == GGL_RGBA) ||
(f->components == GGL_LUMINANCE) ||
(f->components == GGL_LUMINANCE_ALPHA))
{
// format must have all of RGB components
// (so the current color doesn't show through)
c->scanline = scanline_memcpy;
c->init_y = init_y_noop;
return;
}
}
}
if (c->state.needs.match(fill16noblend)) {
c->init_y = init_y_packed;
switch (c->formats[cb_format].size) {
case 1: c->scanline = scanline_memset8; return;
case 2: c->scanline = scanline_memset16; return;
case 4: c->scanline = scanline_memset32; return;
}
}
const int numFilters = sizeof(shortcuts)/sizeof(shortcut_t);
for (int i=0 ; i<numFilters ; i++) {
if (c->state.needs.match(shortcuts[i].filter)) {
c->scanline = shortcuts[i].scanline;
c->init_y = shortcuts[i].init_y;
return;
}
}
#ifdef DEBUG_NEEDS
LOGI("Needs: n=0x%08x p=0x%08x t0=0x%08x t1=0x%08x",
c->state.needs.n, c->state.needs.p,
c->state.needs.t[0], c->state.needs.t[1]);
#endif
#endif // DEBUG__CODEGEN_ONLY
c->init_y = init_y;
c->step_y = step_y__generic;
#if ANDROID_ARM_CODEGEN
// we're going to have to generate some code...
// here, generate code for our pixel pipeline
const AssemblyKey<needs_t> key(c->state.needs);
sp<Assembly> assembly = gCodeCache.lookup(key);
if (assembly == 0) {
// create a new assembly region
sp<ScanlineAssembly> a = new ScanlineAssembly(c->state.needs,
ASSEMBLY_SCRATCH_SIZE);
// initialize our assembler
GGLAssembler assembler( new ARMAssembler(a) );
//GGLAssembler assembler(
// new ARMAssemblerOptimizer(new ARMAssembler(a)) );
// generate the scanline code for the given needs
int err = assembler.scanline(c->state.needs, c);
if (ggl_likely(!err)) {
// finally, cache this assembly
err = gCodeCache.cache(a->key(), a);
}
if (ggl_unlikely(err)) {
LOGE("error generating or caching assembly. Reverting to NOP.");
c->scanline = scanline_noop;
c->init_y = init_y_noop;
c->step_y = step_y__nop;
return;
}
assembly = a;
}
// release the previous assembly
if (c->scanline_as) {
c->scanline_as->decStrong(c);
}
//LOGI("using generated pixel-pipeline");
c->scanline_as = assembly.get();
c->scanline_as->incStrong(c); // hold on to assembly
c->scanline = (void(*)(context_t* c))assembly->base();
#else
// LOGW("using generic (slow) pixel-pipeline");
c->scanline = scanline;
#endif
}
void ggl_pick_scanline(context_t* c)
{
pick_scanline(c);
if ((c->state.enables & GGL_ENABLE_W) &&
(c->state.enables & GGL_ENABLE_TMUS))
{
c->span = c->scanline;
c->scanline = scanline_perspective;
if (!(c->state.enabled_tmu & (c->state.enabled_tmu - 1))) {
// only one TMU enabled
c->scanline = scanline_perspective_single;
}
}
}
// ----------------------------------------------------------------------------
static void blending(context_t* c, pixel_t* fragment, pixel_t* fb);
static void blend_factor(context_t* c, pixel_t* r, uint32_t factor,
const pixel_t* src, const pixel_t* dst);
static void rescale(uint32_t& u, uint8_t& su, uint32_t& v, uint8_t& sv);
#if ANDROID_ARM_CODEGEN && (ANDROID_CODEGEN == ANDROID_CODEGEN_GENERATED)
// no need to compile the generic-pipeline, it can't be reached
void scanline(context_t*)
{
}
#else
void rescale(uint32_t& u, uint8_t& su, uint32_t& v, uint8_t& sv)
{
if (su && sv) {
if (su > sv) {
v = ggl_expand(v, sv, su);
sv = su;
} else if (su < sv) {
u = ggl_expand(u, su, sv);
su = sv;
}
}
}
void blending(context_t* c, pixel_t* fragment, pixel_t* fb)
{
rescale(fragment->c[0], fragment->s[0], fb->c[0], fb->s[0]);
rescale(fragment->c[1], fragment->s[1], fb->c[1], fb->s[1]);
rescale(fragment->c[2], fragment->s[2], fb->c[2], fb->s[2]);
rescale(fragment->c[3], fragment->s[3], fb->c[3], fb->s[3]);
pixel_t sf, df;
blend_factor(c, &sf, c->state.blend.src, fragment, fb);
blend_factor(c, &df, c->state.blend.dst, fragment, fb);
fragment->c[1] =
gglMulAddx(fragment->c[1], sf.c[1], gglMulx(fb->c[1], df.c[1]));
fragment->c[2] =
gglMulAddx(fragment->c[2], sf.c[2], gglMulx(fb->c[2], df.c[2]));
fragment->c[3] =
gglMulAddx(fragment->c[3], sf.c[3], gglMulx(fb->c[3], df.c[3]));
if (c->state.blend.alpha_separate) {
blend_factor(c, &sf, c->state.blend.src_alpha, fragment, fb);
blend_factor(c, &df, c->state.blend.dst_alpha, fragment, fb);
}
fragment->c[0] =
gglMulAddx(fragment->c[0], sf.c[0], gglMulx(fb->c[0], df.c[0]));
// clamp to 1.0
if (fragment->c[0] >= (1LU<<fragment->s[0]))
fragment->c[0] = (1<<fragment->s[0])-1;
if (fragment->c[1] >= (1LU<<fragment->s[1]))
fragment->c[1] = (1<<fragment->s[1])-1;
if (fragment->c[2] >= (1LU<<fragment->s[2]))
fragment->c[2] = (1<<fragment->s[2])-1;
if (fragment->c[3] >= (1LU<<fragment->s[3]))
fragment->c[3] = (1<<fragment->s[3])-1;
}
static inline int blendfactor(uint32_t x, uint32_t size, uint32_t def = 0)
{
if (!size)
return def;
// scale to 16 bits
if (size > 16) {
x >>= (size - 16);
} else if (size < 16) {
x = ggl_expand(x, size, 16);
}
x += x >> 15;
return x;
}
void blend_factor(context_t* c, pixel_t* r,
uint32_t factor, const pixel_t* src, const pixel_t* dst)
{
switch (factor) {
case GGL_ZERO:
r->c[1] =
r->c[2] =
r->c[3] =
r->c[0] = 0;
break;
case GGL_ONE:
r->c[1] =
r->c[2] =
r->c[3] =
r->c[0] = FIXED_ONE;
break;
case GGL_DST_COLOR:
r->c[1] = blendfactor(dst->c[1], dst->s[1]);
r->c[2] = blendfactor(dst->c[2], dst->s[2]);
r->c[3] = blendfactor(dst->c[3], dst->s[3]);
r->c[0] = blendfactor(dst->c[0], dst->s[0]);
break;
case GGL_SRC_COLOR:
r->c[1] = blendfactor(src->c[1], src->s[1]);
r->c[2] = blendfactor(src->c[2], src->s[2]);
r->c[3] = blendfactor(src->c[3], src->s[3]);
r->c[0] = blendfactor(src->c[0], src->s[0]);
break;
case GGL_ONE_MINUS_DST_COLOR:
r->c[1] = FIXED_ONE - blendfactor(dst->c[1], dst->s[1]);
r->c[2] = FIXED_ONE - blendfactor(dst->c[2], dst->s[2]);
r->c[3] = FIXED_ONE - blendfactor(dst->c[3], dst->s[3]);
r->c[0] = FIXED_ONE - blendfactor(dst->c[0], dst->s[0]);
break;
case GGL_ONE_MINUS_SRC_COLOR:
r->c[1] = FIXED_ONE - blendfactor(src->c[1], src->s[1]);
r->c[2] = FIXED_ONE - blendfactor(src->c[2], src->s[2]);
r->c[3] = FIXED_ONE - blendfactor(src->c[3], src->s[3]);
r->c[0] = FIXED_ONE - blendfactor(src->c[0], src->s[0]);
break;
case GGL_SRC_ALPHA:
r->c[1] =
r->c[2] =
r->c[3] =
r->c[0] = blendfactor(src->c[0], src->s[0], FIXED_ONE);
break;
case GGL_ONE_MINUS_SRC_ALPHA:
r->c[1] =
r->c[2] =
r->c[3] =
r->c[0] = FIXED_ONE - blendfactor(src->c[0], src->s[0], FIXED_ONE);
break;
case GGL_DST_ALPHA:
r->c[1] =
r->c[2] =
r->c[3] =
r->c[0] = blendfactor(dst->c[0], dst->s[0], FIXED_ONE);
break;
case GGL_ONE_MINUS_DST_ALPHA:
r->c[1] =
r->c[2] =
r->c[3] =
r->c[0] = FIXED_ONE - blendfactor(dst->c[0], dst->s[0], FIXED_ONE);
break;
case GGL_SRC_ALPHA_SATURATE:
// XXX: GGL_SRC_ALPHA_SATURATE
break;
}
}
static GGLfixed wrapping(int32_t coord, uint32_t size, int tx_wrap)
{
GGLfixed d;
if (tx_wrap == GGL_REPEAT) {
d = (uint32_t(coord)>>16) * size;
} else if (tx_wrap == GGL_CLAMP) { // CLAMP_TO_EDGE semantics
const GGLfixed clamp_min = FIXED_HALF;
const GGLfixed clamp_max = (size << 16) - FIXED_HALF;
if (coord < clamp_min) coord = clamp_min;
if (coord > clamp_max) coord = clamp_max;
d = coord;
} else { // 1:1
const GGLfixed clamp_min = 0;
const GGLfixed clamp_max = (size << 16);
if (coord < clamp_min) coord = clamp_min;
if (coord > clamp_max) coord = clamp_max;
d = coord;
}
return d;
}
static inline
GGLcolor ADJUST_COLOR_ITERATOR(GGLcolor v, GGLcolor dvdx, int len)
{
const int32_t end = dvdx * (len-1) + v;
if (end < 0)
v -= end;
v &= ~(v>>31);
return v;
}
void scanline(context_t* c)
{
const uint32_t enables = c->state.enables;
const int xs = c->iterators.xl;
const int x1 = c->iterators.xr;
int xc = x1 - xs;
const int16_t* covPtr = c->state.buffers.coverage + xs;
// All iterated values are sampled at the pixel center
// reset iterators for that scanline...
GGLcolor r, g, b, a;
iterators_t& ci = c->iterators;
if (enables & GGL_ENABLE_SMOOTH) {
r = (xs * c->shade.drdx) + ci.ydrdy;
g = (xs * c->shade.dgdx) + ci.ydgdy;
b = (xs * c->shade.dbdx) + ci.ydbdy;
a = (xs * c->shade.dadx) + ci.ydady;
r = ADJUST_COLOR_ITERATOR(r, c->shade.drdx, xc);
g = ADJUST_COLOR_ITERATOR(g, c->shade.dgdx, xc);
b = ADJUST_COLOR_ITERATOR(b, c->shade.dbdx, xc);
a = ADJUST_COLOR_ITERATOR(a, c->shade.dadx, xc);
} else {
r = ci.ydrdy;
g = ci.ydgdy;
b = ci.ydbdy;
a = ci.ydady;
}
// z iterators are 1.31
GGLfixed z = (xs * c->shade.dzdx) + ci.ydzdy;
GGLfixed f = (xs * c->shade.dfdx) + ci.ydfdy;
struct {
GGLfixed s, t;
} tc[GGL_TEXTURE_UNIT_COUNT];
if (enables & GGL_ENABLE_TMUS) {
for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) {
if (c->state.texture[i].enable) {
texture_iterators_t& ti = c->state.texture[i].iterators;
if (enables & GGL_ENABLE_W) {
tc[i].s = ti.ydsdy;
tc[i].t = ti.ydtdy;
} else {
tc[i].s = (xs * ti.dsdx) + ti.ydsdy;
tc[i].t = (xs * ti.dtdx) + ti.ydtdy;
}
}
}
}
pixel_t fragment;
pixel_t texel;
pixel_t fb;
uint32_t x = xs;
uint32_t y = c->iterators.y;
while (xc--) {
{ // just a scope
// read color (convert to 8 bits by keeping only the integer part)
fragment.s[1] = fragment.s[2] =
fragment.s[3] = fragment.s[0] = 8;
fragment.c[1] = r >> (GGL_COLOR_BITS-8);
fragment.c[2] = g >> (GGL_COLOR_BITS-8);
fragment.c[3] = b >> (GGL_COLOR_BITS-8);
fragment.c[0] = a >> (GGL_COLOR_BITS-8);
// texturing
if (enables & GGL_ENABLE_TMUS) {
for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) {
texture_t& tx = c->state.texture[i];
if (!tx.enable)
continue;
texture_iterators_t& ti = tx.iterators;
int32_t u, v;
// s-coordinate
if (tx.s_coord != GGL_ONE_TO_ONE) {
const int w = tx.surface.width;
u = wrapping(tc[i].s, w, tx.s_wrap);
tc[i].s += ti.dsdx;
} else {
u = (((tx.shade.is0>>16) + x)<<16) + FIXED_HALF;
}
// t-coordinate
if (tx.t_coord != GGL_ONE_TO_ONE) {
const int h = tx.surface.height;
v = wrapping(tc[i].t, h, tx.t_wrap);
tc[i].t += ti.dtdx;
} else {
v = (((tx.shade.it0>>16) + y)<<16) + FIXED_HALF;
}
// read texture
if (tx.mag_filter == GGL_NEAREST &&
tx.min_filter == GGL_NEAREST)
{
u >>= 16;
v >>= 16;
tx.surface.read(&tx.surface, c, u, v, &texel);
} else {
const int w = tx.surface.width;
const int h = tx.surface.height;
u -= FIXED_HALF;
v -= FIXED_HALF;
int u0 = u >> 16;
int v0 = v >> 16;
int u1 = u0 + 1;
int v1 = v0 + 1;
if (tx.s_wrap == GGL_REPEAT) {
if (u0<0) u0 += w;
if (u1<0) u1 += w;
if (u0>=w) u0 -= w;
if (u1>=w) u1 -= w;
} else {
if (u0<0) u0 = 0;
if (u1<0) u1 = 0;
if (u0>=w) u0 = w-1;
if (u1>=w) u1 = w-1;
}
if (tx.t_wrap == GGL_REPEAT) {
if (v0<0) v0 += h;
if (v1<0) v1 += h;
if (v0>=h) v0 -= h;
if (v1>=h) v1 -= h;
} else {
if (v0<0) v0 = 0;
if (v1<0) v1 = 0;
if (v0>=h) v0 = h-1;
if (v1>=h) v1 = h-1;
}
pixel_t texels[4];
uint32_t mm[4];
tx.surface.read(&tx.surface, c, u0, v0, &texels[0]);
tx.surface.read(&tx.surface, c, u0, v1, &texels[1]);
tx.surface.read(&tx.surface, c, u1, v0, &texels[2]);
tx.surface.read(&tx.surface, c, u1, v1, &texels[3]);
u = (u >> 12) & 0xF;
v = (v >> 12) & 0xF;
u += u>>3;
v += v>>3;
mm[0] = (0x10 - u) * (0x10 - v);
mm[1] = (0x10 - u) * v;
mm[2] = u * (0x10 - v);
mm[3] = 0x100 - (mm[0] + mm[1] + mm[2]);
for (int j=0 ; j<4 ; j++) {
texel.s[j] = texels[0].s[j];
if (!texel.s[j]) continue;
texel.s[j] += 8;
texel.c[j] = texels[0].c[j]*mm[0] +
texels[1].c[j]*mm[1] +
texels[2].c[j]*mm[2] +
texels[3].c[j]*mm[3] ;
}
}
// Texture environnement...
for (int j=0 ; j<4 ; j++) {
uint32_t& Cf = fragment.c[j];
uint32_t& Ct = texel.c[j];
uint8_t& sf = fragment.s[j];
uint8_t& st = texel.s[j];
uint32_t At = texel.c[0];
uint8_t sat = texel.s[0];
switch (tx.env) {
case GGL_REPLACE:
if (st) {
Cf = Ct;
sf = st;
}
break;
case GGL_MODULATE:
if (st) {
uint32_t factor = Ct + (Ct>>(st-1));
Cf = (Cf * factor) >> st;
}
break;
case GGL_DECAL:
if (sat) {
rescale(Cf, sf, Ct, st);
Cf += ((Ct - Cf) * (At + (At>>(sat-1)))) >> sat;
}
break;
case GGL_BLEND:
if (st) {
uint32_t Cc = tx.env_color[i];
if (sf>8) Cc = (Cc * ((1<<sf)-1))>>8;
else if (sf<8) Cc = (Cc - (Cc>>(8-sf)))>>(8-sf);
uint32_t factor = Ct + (Ct>>(st-1));
Cf = ((((1<<st) - factor) * Cf) + Ct*Cc)>>st;
}
break;
case GGL_ADD:
if (st) {
rescale(Cf, sf, Ct, st);
Cf += Ct;
}
break;
}
}
}
}
// coverage application
if (enables & GGL_ENABLE_AA) {
int16_t cf = *covPtr++;
fragment.c[0] = (int64_t(fragment.c[0]) * cf) >> 15;
}
// alpha-test
if (enables & GGL_ENABLE_ALPHA_TEST) {
GGLcolor ref = c->state.alpha_test.ref;
GGLcolor alpha = (uint64_t(fragment.c[0]) *
((1<<GGL_COLOR_BITS)-1)) / ((1<<fragment.s[0])-1);
switch (c->state.alpha_test.func) {
case GGL_NEVER: goto discard;
case GGL_LESS: if (alpha<ref) break; goto discard;
case GGL_EQUAL: if (alpha==ref) break; goto discard;
case GGL_LEQUAL: if (alpha<=ref) break; goto discard;
case GGL_GREATER: if (alpha>ref) break; goto discard;
case GGL_NOTEQUAL: if (alpha!=ref) break; goto discard;
case GGL_GEQUAL: if (alpha>=ref) break; goto discard;
}
}
// depth test
if (c->state.buffers.depth.format) {
if (enables & GGL_ENABLE_DEPTH_TEST) {
surface_t* cb = &(c->state.buffers.depth);
uint16_t* p = (uint16_t*)(cb->data)+(x+(cb->stride*y));
uint16_t zz = uint32_t(z)>>(16);
uint16_t depth = *p;
switch (c->state.depth_test.func) {
case GGL_NEVER: goto discard;
case GGL_LESS: if (zz<depth) break; goto discard;
case GGL_EQUAL: if (zz==depth) break; goto discard;
case GGL_LEQUAL: if (zz<=depth) break; goto discard;
case GGL_GREATER: if (zz>depth) break; goto discard;
case GGL_NOTEQUAL: if (zz!=depth) break; goto discard;
case GGL_GEQUAL: if (zz>=depth) break; goto discard;
}
// depth buffer is not enabled, if depth-test is not enabled
/*
fragment.s[1] = fragment.s[2] =
fragment.s[3] = fragment.s[0] = 8;
fragment.c[1] =
fragment.c[2] =
fragment.c[3] =
fragment.c[0] = 255 - (zz>>8);
*/
if (c->state.mask.depth) {
*p = zz;
}
}
}
// fog
if (enables & GGL_ENABLE_FOG) {
for (int i=1 ; i<=3 ; i++) {
GGLfixed fc = (c->state.fog.color[i] * 0x10000) / 0xFF;
uint32_t& c = fragment.c[i];
uint8_t& s = fragment.s[i];
c = (c * 0x10000) / ((1<<s)-1);
c = gglMulAddx(c, f, gglMulx(fc, 0x10000 - f));
s = 16;
}
}
// blending
if (enables & GGL_ENABLE_BLENDING) {
fb.c[1] = fb.c[2] = fb.c[3] = fb.c[0] = 0; // placate valgrind
fb.s[1] = fb.s[2] = fb.s[3] = fb.s[0] = 0;
c->state.buffers.color.read(
&(c->state.buffers.color), c, x, y, &fb);
blending( c, &fragment, &fb );
}
// write
c->state.buffers.color.write(
&(c->state.buffers.color), c, x, y, &fragment);
}
discard:
// iterate...
x += 1;
if (enables & GGL_ENABLE_SMOOTH) {
r += c->shade.drdx;
g += c->shade.dgdx;
b += c->shade.dbdx;
a += c->shade.dadx;
}
z += c->shade.dzdx;
f += c->shade.dfdx;
}
}
#endif // ANDROID_ARM_CODEGEN && (ANDROID_CODEGEN == ANDROID_CODEGEN_GENERATED)
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#pragma mark Scanline
#endif
/* Used to parse a 32-bit source texture linearly. Usage is:
*
* horz_iterator32 hi(context);
* while (...) {
* uint32_t src_pixel = hi.get_pixel32();
* ...
* }
*
* Use only for one-to-one texture mapping.
*/
struct horz_iterator32 {
horz_iterator32(context_t* c) {
const int x = c->iterators.xl;
const int y = c->iterators.y;
texture_t& tx = c->state.texture[0];
const int32_t u = (tx.shade.is0>>16) + x;
const int32_t v = (tx.shade.it0>>16) + y;
m_src = reinterpret_cast<uint32_t*>(tx.surface.data)+(u+(tx.surface.stride*v));
}
uint32_t get_pixel32() {
return *m_src++;
}
protected:
uint32_t* m_src;
};
/* A variant for 16-bit source textures. */
struct horz_iterator16 {
horz_iterator16(context_t* c) {
const int x = c->iterators.xl;
const int y = c->iterators.y;
texture_t& tx = c->state.texture[0];
const int32_t u = (tx.shade.is0>>16) + x;
const int32_t v = (tx.shade.it0>>16) + y;
m_src = reinterpret_cast<uint16_t*>(tx.surface.data)+(u+(tx.surface.stride*v));
}
uint16_t get_pixel16() {
return *m_src++;
}
protected:
uint16_t* m_src;
};
/* A clamp iterator is used to iterate inside a texture with GGL_CLAMP.
* After initialization, call get_src16() or get_src32() to get the current
* texture pixel value.
*/
struct clamp_iterator {
clamp_iterator(context_t* c) {
const int xs = c->iterators.xl;
texture_t& tx = c->state.texture[0];
texture_iterators_t& ti = tx.iterators;
m_s = (xs * ti.dsdx) + ti.ydsdy;
m_t = (xs * ti.dtdx) + ti.ydtdy;
m_ds = ti.dsdx;
m_dt = ti.dtdx;
m_width_m1 = tx.surface.width - 1;
m_height_m1 = tx.surface.height - 1;
m_data = tx.surface.data;
m_stride = tx.surface.stride;
}
uint16_t get_pixel16() {
int u, v;
get_uv(u, v);
uint16_t* src = reinterpret_cast<uint16_t*>(m_data) + (u + (m_stride*v));
return src[0];
}
uint32_t get_pixel32() {
int u, v;
get_uv(u, v);
uint32_t* src = reinterpret_cast<uint32_t*>(m_data) + (u + (m_stride*v));
return src[0];
}
private:
void get_uv(int& u, int& v) {
int uu = m_s >> 16;
int vv = m_t >> 16;
if (uu < 0)
uu = 0;
if (uu > m_width_m1)
uu = m_width_m1;
if (vv < 0)
vv = 0;
if (vv > m_height_m1)
vv = m_height_m1;
u = uu;
v = vv;
m_s += m_ds;
m_t += m_dt;
}
GGLfixed m_s, m_t;
GGLfixed m_ds, m_dt;
int m_width_m1, m_height_m1;
uint8_t* m_data;
int m_stride;
};
/*
* The 'horizontal clamp iterator' variant corresponds to the case where
* the 'v' coordinate doesn't change. This is useful to avoid one mult and
* extra adds / checks per pixels, if the blending/processing operation after
* this is very fast.
*/
static int is_context_horizontal(const context_t* c) {
return (c->state.texture[0].iterators.dtdx == 0);
}
struct horz_clamp_iterator {
uint16_t get_pixel16() {
int u = m_s >> 16;
m_s += m_ds;
if (u < 0)
u = 0;
if (u > m_width_m1)
u = m_width_m1;
const uint16_t* src = reinterpret_cast<const uint16_t*>(m_data);
return src[u];
}
uint32_t get_pixel32() {
int u = m_s >> 16;
m_s += m_ds;
if (u < 0)
u = 0;
if (u > m_width_m1)
u = m_width_m1;
const uint32_t* src = reinterpret_cast<const uint32_t*>(m_data);
return src[u];
}
protected:
void init(const context_t* c, int shift);
GGLfixed m_s;
GGLfixed m_ds;
int m_width_m1;
const uint8_t* m_data;
};
void horz_clamp_iterator::init(const context_t* c, int shift)
{
const int xs = c->iterators.xl;
const texture_t& tx = c->state.texture[0];
const texture_iterators_t& ti = tx.iterators;
m_s = (xs * ti.dsdx) + ti.ydsdy;
m_ds = ti.dsdx;
m_width_m1 = tx.surface.width-1;
m_data = tx.surface.data;
GGLfixed t = (xs * ti.dtdx) + ti.ydtdy;
int v = t >> 16;
if (v < 0)
v = 0;
else if (v >= (int)tx.surface.height)
v = (int)tx.surface.height-1;
m_data += (tx.surface.stride*v) << shift;
}
struct horz_clamp_iterator16 : horz_clamp_iterator {
horz_clamp_iterator16(const context_t* c) {
init(c,1);
};
};
struct horz_clamp_iterator32 : horz_clamp_iterator {
horz_clamp_iterator32(context_t* c) {
init(c,2);
};
};
/* This is used to perform dithering operations.
*/
struct ditherer {
ditherer(const context_t* c) {
const int x = c->iterators.xl;
const int y = c->iterators.y;
m_line = &c->ditherMatrix[ ((y & GGL_DITHER_MASK)<<GGL_DITHER_ORDER_SHIFT) ];
m_index = x & GGL_DITHER_MASK;
}
void step(void) {
m_index++;
}
int get_value(void) {
int ret = m_line[m_index & GGL_DITHER_MASK];
m_index++;
return ret;
}
uint16_t abgr8888ToRgb565(uint32_t s) {
uint32_t r = s & 0xff;
uint32_t g = (s >> 8) & 0xff;
uint32_t b = (s >> 16) & 0xff;
return rgb888ToRgb565(r,g,b);
}
/* The following assumes that r/g/b are in the 0..255 range each */
uint16_t rgb888ToRgb565(uint32_t& r, uint32_t& g, uint32_t &b) {
int threshold = get_value();
/* dither in on GGL_DITHER_BITS, and each of r, g, b is on 8 bits */
r += (threshold >> (GGL_DITHER_BITS-8 +5));
g += (threshold >> (GGL_DITHER_BITS-8 +6));
b += (threshold >> (GGL_DITHER_BITS-8 +5));
if (r > 0xff)
r = 0xff;
if (g > 0xff)
g = 0xff;
if (b > 0xff)
b = 0xff;
return uint16_t(((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3));
}
protected:
const uint8_t* m_line;
int m_index;
};
/* This structure is used to blend (SRC_OVER) 32-bit source pixels
* onto 16-bit destination ones. Usage is simply:
*
* blender.blend(<32-bit-src-pixel-value>,<ptr-to-16-bit-dest-pixel>)
*/
struct blender_32to16 {
blender_32to16(context_t* c) { }
void write(uint32_t s, uint16_t* dst) {
if (s == 0)
return;
s = GGL_RGBA_TO_HOST(s);
int sA = (s>>24);
if (sA == 0xff) {
*dst = convertAbgr8888ToRgb565(s);
} else {
int f = 0x100 - (sA + (sA>>7));
int sR = (s >> ( 3))&0x1F;
int sG = (s >> ( 8+2))&0x3F;
int sB = (s >> (16+3))&0x1F;
uint16_t d = *dst;
int dR = (d>>11)&0x1f;
int dG = (d>>5)&0x3f;
int dB = (d)&0x1f;
sR += (f*dR)>>8;
sG += (f*dG)>>8;
sB += (f*dB)>>8;
*dst = uint16_t((sR<<11)|(sG<<5)|sB);
}
}
void write(uint32_t s, uint16_t* dst, ditherer& di) {
if (s == 0) {
di.step();
return;
}
s = GGL_RGBA_TO_HOST(s);
int sA = (s>>24);
if (sA == 0xff) {
*dst = di.abgr8888ToRgb565(s);
} else {
int threshold = di.get_value() << (8 - GGL_DITHER_BITS);
int f = 0x100 - (sA + (sA>>7));
int sR = (s >> ( 3))&0x1F;
int sG = (s >> ( 8+2))&0x3F;
int sB = (s >> (16+3))&0x1F;
uint16_t d = *dst;
int dR = (d>>11)&0x1f;
int dG = (d>>5)&0x3f;
int dB = (d)&0x1f;
sR = ((sR << 8) + f*dR + threshold)>>8;
sG = ((sG << 8) + f*dG + threshold)>>8;
sB = ((sB << 8) + f*dB + threshold)>>8;
if (sR > 0x1f) sR = 0x1f;
if (sG > 0x3f) sG = 0x3f;
if (sB > 0x1f) sB = 0x1f;
*dst = uint16_t((sR<<11)|(sG<<5)|sB);
}
}
};
/* This blender does the same for the 'blend_srca' operation.
* where dstFactor=srcA*(1-srcA) srcFactor=srcA
*/
struct blender_32to16_srcA {
blender_32to16_srcA(const context_t* c) { }
void write(uint32_t s, uint16_t* dst) {
if (!s) {
return;
}
uint16_t d = *dst;
s = GGL_RGBA_TO_HOST(s);
int sR = (s >> ( 3))&0x1F;
int sG = (s >> ( 8+2))&0x3F;
int sB = (s >> (16+3))&0x1F;
int sA = (s>>24);
int f1 = (sA + (sA>>7));
int f2 = 0x100-f1;
int dR = (d>>11)&0x1f;
int dG = (d>>5)&0x3f;
int dB = (d)&0x1f;
sR = (f1*sR + f2*dR)>>8;
sG = (f1*sG + f2*dG)>>8;
sB = (f1*sB + f2*dB)>>8;
*dst = uint16_t((sR<<11)|(sG<<5)|sB);
}
};
/* Common init code the modulating blenders */
struct blender_modulate {
void init(const context_t* c) {
const int r = c->iterators.ydrdy >> (GGL_COLOR_BITS-8);
const int g = c->iterators.ydgdy >> (GGL_COLOR_BITS-8);
const int b = c->iterators.ydbdy >> (GGL_COLOR_BITS-8);
const int a = c->iterators.ydady >> (GGL_COLOR_BITS-8);
m_r = r + (r >> 7);
m_g = g + (g >> 7);
m_b = b + (b >> 7);
m_a = a + (a >> 7);
}
protected:
int m_r, m_g, m_b, m_a;
};
/* This blender does a normal blend after modulation.
*/
struct blender_32to16_modulate : blender_modulate {
blender_32to16_modulate(const context_t* c) {
init(c);
}
void write(uint32_t s, uint16_t* dst) {
// blend source and destination
if (!s) {
return;
}
s = GGL_RGBA_TO_HOST(s);
/* We need to modulate s */
uint32_t sA = (s >> 24);
uint32_t sB = (s >> 16) & 0xff;
uint32_t sG = (s >> 8) & 0xff;
uint32_t sR = s & 0xff;
sA = (sA*m_a) >> 8;
/* Keep R/G/B scaled to 5.8 or 6.8 fixed float format */
sR = (sR*m_r) >> (8 - 5);
sG = (sG*m_g) >> (8 - 6);
sB = (sB*m_b) >> (8 - 5);
/* Now do a normal blend */
int f = 0x100 - (sA + (sA>>7));
uint16_t d = *dst;
int dR = (d>>11)&0x1f;
int dG = (d>>5)&0x3f;
int dB = (d)&0x1f;
sR = (sR + f*dR)>>8;
sG = (sG + f*dG)>>8;
sB = (sB + f*dB)>>8;
*dst = uint16_t((sR<<11)|(sG<<5)|sB);
}
void write(uint32_t s, uint16_t* dst, ditherer& di) {
// blend source and destination
if (!s) {
di.step();
return;
}
s = GGL_RGBA_TO_HOST(s);
/* We need to modulate s */
uint32_t sA = (s >> 24);
uint32_t sB = (s >> 16) & 0xff;
uint32_t sG = (s >> 8) & 0xff;
uint32_t sR = s & 0xff;
sA = (sA*m_a) >> 8;
/* keep R/G/B scaled to 5.8 or 6.8 fixed float format */
sR = (sR*m_r) >> (8 - 5);
sG = (sG*m_g) >> (8 - 6);
sB = (sB*m_b) >> (8 - 5);
/* Scale threshold to 0.8 fixed float format */
int threshold = di.get_value() << (8 - GGL_DITHER_BITS);
int f = 0x100 - (sA + (sA>>7));
uint16_t d = *dst;
int dR = (d>>11)&0x1f;
int dG = (d>>5)&0x3f;
int dB = (d)&0x1f;
sR = (sR + f*dR + threshold)>>8;
sG = (sG + f*dG + threshold)>>8;
sB = (sB + f*dB + threshold)>>8;
if (sR > 0x1f) sR = 0x1f;
if (sG > 0x3f) sG = 0x3f;
if (sB > 0x1f) sB = 0x1f;
*dst = uint16_t((sR<<11)|(sG<<5)|sB);
}
};
/* same as 32to16_modulate, except that the input is xRGB, instead of ARGB */
struct blender_x32to16_modulate : blender_modulate {
blender_x32to16_modulate(const context_t* c) {
init(c);
}
void write(uint32_t s, uint16_t* dst) {
s = GGL_RGBA_TO_HOST(s);
uint32_t sB = (s >> 16) & 0xff;
uint32_t sG = (s >> 8) & 0xff;
uint32_t sR = s & 0xff;
/* Keep R/G/B in 5.8 or 6.8 format */
sR = (sR*m_r) >> (8 - 5);
sG = (sG*m_g) >> (8 - 6);
sB = (sB*m_b) >> (8 - 5);
int f = 0x100 - m_a;
uint16_t d = *dst;
int dR = (d>>11)&0x1f;
int dG = (d>>5)&0x3f;
int dB = (d)&0x1f;
sR = (sR + f*dR)>>8;
sG = (sG + f*dG)>>8;
sB = (sB + f*dB)>>8;
*dst = uint16_t((sR<<11)|(sG<<5)|sB);
}
void write(uint32_t s, uint16_t* dst, ditherer& di) {
s = GGL_RGBA_TO_HOST(s);
uint32_t sB = (s >> 16) & 0xff;
uint32_t sG = (s >> 8) & 0xff;
uint32_t sR = s & 0xff;
sR = (sR*m_r) >> (8 - 5);
sG = (sG*m_g) >> (8 - 6);
sB = (sB*m_b) >> (8 - 5);
/* Now do a normal blend */
int threshold = di.get_value() << (8 - GGL_DITHER_BITS);
int f = 0x100 - m_a;
uint16_t d = *dst;
int dR = (d>>11)&0x1f;
int dG = (d>>5)&0x3f;
int dB = (d)&0x1f;
sR = (sR + f*dR + threshold)>>8;
sG = (sG + f*dG + threshold)>>8;
sB = (sB + f*dB + threshold)>>8;
if (sR > 0x1f) sR = 0x1f;
if (sG > 0x3f) sG = 0x3f;
if (sB > 0x1f) sB = 0x1f;
*dst = uint16_t((sR<<11)|(sG<<5)|sB);
}
};
/* Same as above, but source is 16bit rgb565 */
struct blender_16to16_modulate : blender_modulate {
blender_16to16_modulate(const context_t* c) {
init(c);
}
void write(uint16_t s16, uint16_t* dst) {
uint32_t s = s16;
uint32_t sR = s >> 11;
uint32_t sG = (s >> 5) & 0x3f;
uint32_t sB = s & 0x1f;
sR = (sR*m_r);
sG = (sG*m_g);
sB = (sB*m_b);
int f = 0x100 - m_a;
uint16_t d = *dst;
int dR = (d>>11)&0x1f;
int dG = (d>>5)&0x3f;
int dB = (d)&0x1f;
sR = (sR + f*dR)>>8;
sG = (sG + f*dG)>>8;
sB = (sB + f*dB)>>8;
*dst = uint16_t((sR<<11)|(sG<<5)|sB);
}
};
/* This is used to iterate over a 16-bit destination color buffer.
* Usage is:
*
* dst_iterator16 di(context);
* while (di.count--) {
* <do stuff with dest pixel at di.dst>
* di.dst++;
* }
*/
struct dst_iterator16 {
dst_iterator16(const context_t* c) {
const int x = c->iterators.xl;
const int width = c->iterators.xr - x;
const int32_t y = c->iterators.y;
const surface_t* cb = &(c->state.buffers.color);
count = width;
dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y));
}
int count;
uint16_t* dst;
};
static void scanline_t32cb16_clamp(context_t* c)
{
dst_iterator16 di(c);
if (is_context_horizontal(c)) {
/* Special case for simple horizontal scaling */
horz_clamp_iterator32 ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
*di.dst++ = convertAbgr8888ToRgb565(s);
}
} else {
/* General case */
clamp_iterator ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
*di.dst++ = convertAbgr8888ToRgb565(s);
}
}
}
static void scanline_t32cb16_dither(context_t* c)
{
horz_iterator32 si(c);
dst_iterator16 di(c);
ditherer dither(c);
while (di.count--) {
uint32_t s = si.get_pixel32();
*di.dst++ = dither.abgr8888ToRgb565(s);
}
}
static void scanline_t32cb16_clamp_dither(context_t* c)
{
dst_iterator16 di(c);
ditherer dither(c);
if (is_context_horizontal(c)) {
/* Special case for simple horizontal scaling */
horz_clamp_iterator32 ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
*di.dst++ = dither.abgr8888ToRgb565(s);
}
} else {
/* General case */
clamp_iterator ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
*di.dst++ = dither.abgr8888ToRgb565(s);
}
}
}
static void scanline_t32cb16blend_dither(context_t* c)
{
dst_iterator16 di(c);
ditherer dither(c);
blender_32to16 bl(c);
horz_iterator32 hi(c);
while (di.count--) {
uint32_t s = hi.get_pixel32();
bl.write(s, di.dst, dither);
di.dst++;
}
}
static void scanline_t32cb16blend_clamp(context_t* c)
{
dst_iterator16 di(c);
blender_32to16 bl(c);
if (is_context_horizontal(c)) {
horz_clamp_iterator32 ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
bl.write(s, di.dst);
di.dst++;
}
} else {
clamp_iterator ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
bl.write(s, di.dst);
di.dst++;
}
}
}
static void scanline_t32cb16blend_clamp_dither(context_t* c)
{
dst_iterator16 di(c);
ditherer dither(c);
blender_32to16 bl(c);
clamp_iterator ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
bl.write(s, di.dst, dither);
di.dst++;
}
}
void scanline_t32cb16blend_clamp_mod(context_t* c)
{
dst_iterator16 di(c);
blender_32to16_modulate bl(c);
clamp_iterator ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
bl.write(s, di.dst);
di.dst++;
}
}
void scanline_t32cb16blend_clamp_mod_dither(context_t* c)
{
dst_iterator16 di(c);
blender_32to16_modulate bl(c);
ditherer dither(c);
clamp_iterator ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
bl.write(s, di.dst, dither);
di.dst++;
}
}
/* Variant of scanline_t32cb16blend_clamp_mod with a xRGB texture */
void scanline_x32cb16blend_clamp_mod(context_t* c)
{
dst_iterator16 di(c);
blender_x32to16_modulate bl(c);
clamp_iterator ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
bl.write(s, di.dst);
di.dst++;
}
}
void scanline_x32cb16blend_clamp_mod_dither(context_t* c)
{
dst_iterator16 di(c);
blender_x32to16_modulate bl(c);
ditherer dither(c);
clamp_iterator ci(c);
while (di.count--) {
uint32_t s = ci.get_pixel32();
bl.write(s, di.dst, dither);
di.dst++;
}
}
void scanline_t16cb16_clamp(context_t* c)
{
dst_iterator16 di(c);
/* Special case for simple horizontal scaling */
if (is_context_horizontal(c)) {
horz_clamp_iterator16 ci(c);
while (di.count--) {
*di.dst++ = ci.get_pixel16();
}
} else {
clamp_iterator ci(c);
while (di.count--) {
*di.dst++ = ci.get_pixel16();
}
}
}
template <typename T, typename U>
static inline __attribute__((const))
T interpolate(int y, T v0, U dvdx, U dvdy) {
// interpolates in pixel's centers
// v = v0 + (y + 0.5) * dvdy + (0.5 * dvdx)
return (y * dvdy) + (v0 + ((dvdy + dvdx) >> 1));
}
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#endif
void init_y(context_t* c, int32_t ys)
{
const uint32_t enables = c->state.enables;
// compute iterators...
iterators_t& ci = c->iterators;
// sample in the center
ci.y = ys;
if (enables & (GGL_ENABLE_DEPTH_TEST|GGL_ENABLE_W|GGL_ENABLE_FOG)) {
ci.ydzdy = interpolate(ys, c->shade.z0, c->shade.dzdx, c->shade.dzdy);
ci.ydwdy = interpolate(ys, c->shade.w0, c->shade.dwdx, c->shade.dwdy);
ci.ydfdy = interpolate(ys, c->shade.f0, c->shade.dfdx, c->shade.dfdy);
}
if (ggl_unlikely(enables & GGL_ENABLE_SMOOTH)) {
ci.ydrdy = interpolate(ys, c->shade.r0, c->shade.drdx, c->shade.drdy);
ci.ydgdy = interpolate(ys, c->shade.g0, c->shade.dgdx, c->shade.dgdy);
ci.ydbdy = interpolate(ys, c->shade.b0, c->shade.dbdx, c->shade.dbdy);
ci.ydady = interpolate(ys, c->shade.a0, c->shade.dadx, c->shade.dady);
c->step_y = step_y__smooth;
} else {
ci.ydrdy = c->shade.r0;
ci.ydgdy = c->shade.g0;
ci.ydbdy = c->shade.b0;
ci.ydady = c->shade.a0;
// XXX: do only if needed, or make sure this is fast
c->packed = ggl_pack_color(c, c->state.buffers.color.format,
ci.ydrdy, ci.ydgdy, ci.ydbdy, ci.ydady);
c->packed8888 = ggl_pack_color(c, GGL_PIXEL_FORMAT_RGBA_8888,
ci.ydrdy, ci.ydgdy, ci.ydbdy, ci.ydady);
}
// initialize the variables we need in the shader
generated_vars_t& gen = c->generated_vars;
gen.argb[GGLFormat::ALPHA].c = ci.ydady;
gen.argb[GGLFormat::ALPHA].dx = c->shade.dadx;
gen.argb[GGLFormat::RED ].c = ci.ydrdy;
gen.argb[GGLFormat::RED ].dx = c->shade.drdx;
gen.argb[GGLFormat::GREEN].c = ci.ydgdy;
gen.argb[GGLFormat::GREEN].dx = c->shade.dgdx;
gen.argb[GGLFormat::BLUE ].c = ci.ydbdy;
gen.argb[GGLFormat::BLUE ].dx = c->shade.dbdx;
gen.dzdx = c->shade.dzdx;
gen.f = ci.ydfdy;
gen.dfdx = c->shade.dfdx;
if (enables & GGL_ENABLE_TMUS) {
for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) {
texture_t& t = c->state.texture[i];
if (!t.enable) continue;
texture_iterators_t& ti = t.iterators;
if (t.s_coord == GGL_ONE_TO_ONE && t.t_coord == GGL_ONE_TO_ONE) {
// we need to set all of these to 0 because in some cases
// step_y__generic() or step_y__tmu() will be used and
// therefore will update dtdy, however, in 1:1 mode
// this is always done by the scanline rasterizer.
ti.dsdx = ti.dsdy = ti.dtdx = ti.dtdy = 0;
ti.ydsdy = t.shade.is0;
ti.ydtdy = t.shade.it0;
} else {
const int adjustSWrap = ((t.s_wrap==GGL_CLAMP)?0:16);
const int adjustTWrap = ((t.t_wrap==GGL_CLAMP)?0:16);
ti.sscale = t.shade.sscale + adjustSWrap;
ti.tscale = t.shade.tscale + adjustTWrap;
if (!(enables & GGL_ENABLE_W)) {
// S coordinate
const int32_t sscale = ti.sscale;
const int32_t sy = interpolate(ys,
t.shade.is0, t.shade.idsdx, t.shade.idsdy);
if (sscale>=0) {
ti.ydsdy= sy << sscale;
ti.dsdx = t.shade.idsdx << sscale;
ti.dsdy = t.shade.idsdy << sscale;
} else {
ti.ydsdy= sy >> -sscale;
ti.dsdx = t.shade.idsdx >> -sscale;
ti.dsdy = t.shade.idsdy >> -sscale;
}
// T coordinate
const int32_t tscale = ti.tscale;
const int32_t ty = interpolate(ys,
t.shade.it0, t.shade.idtdx, t.shade.idtdy);
if (tscale>=0) {
ti.ydtdy= ty << tscale;
ti.dtdx = t.shade.idtdx << tscale;
ti.dtdy = t.shade.idtdy << tscale;
} else {
ti.ydtdy= ty >> -tscale;
ti.dtdx = t.shade.idtdx >> -tscale;
ti.dtdy = t.shade.idtdy >> -tscale;
}
}
}
// mirror for generated code...
generated_tex_vars_t& gen = c->generated_vars.texture[i];
gen.width = t.surface.width;
gen.height = t.surface.height;
gen.stride = t.surface.stride;
gen.data = int32_t(t.surface.data);
gen.dsdx = ti.dsdx;
gen.dtdx = ti.dtdx;
}
}
// choose the y-stepper
c->step_y = step_y__nop;
if (enables & GGL_ENABLE_FOG) {
c->step_y = step_y__generic;
} else if (enables & GGL_ENABLE_TMUS) {
if (enables & GGL_ENABLE_SMOOTH) {
c->step_y = step_y__generic;
} else if (enables & GGL_ENABLE_W) {
c->step_y = step_y__w;
} else {
c->step_y = step_y__tmu;
}
} else {
if (enables & GGL_ENABLE_SMOOTH) {
c->step_y = step_y__smooth;
}
}
// choose the rectangle blitter
c->rect = rect_generic;
if ((c->step_y == step_y__nop) &&
(c->scanline == scanline_memcpy))
{
c->rect = rect_memcpy;
}
}
void init_y_packed(context_t* c, int32_t y0)
{
uint8_t f = c->state.buffers.color.format;
c->packed = ggl_pack_color(c, f,
c->shade.r0, c->shade.g0, c->shade.b0, c->shade.a0);
c->packed8888 = ggl_pack_color(c, GGL_PIXEL_FORMAT_RGBA_8888,
c->shade.r0, c->shade.g0, c->shade.b0, c->shade.a0);
c->iterators.y = y0;
c->step_y = step_y__nop;
// choose the rectangle blitter
c->rect = rect_generic;
if (c->scanline == scanline_memcpy) {
c->rect = rect_memcpy;
}
}
void init_y_noop(context_t* c, int32_t y0)
{
c->iterators.y = y0;
c->step_y = step_y__nop;
// choose the rectangle blitter
c->rect = rect_generic;
if (c->scanline == scanline_memcpy) {
c->rect = rect_memcpy;
}
}
void init_y_error(context_t* c, int32_t y0)
{
// woooops, shoud never happen,
// fail gracefully (don't display anything)
init_y_noop(c, y0);
LOGE("color-buffer has an invalid format!");
}
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#endif
void step_y__generic(context_t* c)
{
const uint32_t enables = c->state.enables;
// iterate...
iterators_t& ci = c->iterators;
ci.y += 1;
if (enables & GGL_ENABLE_SMOOTH) {
ci.ydrdy += c->shade.drdy;
ci.ydgdy += c->shade.dgdy;
ci.ydbdy += c->shade.dbdy;
ci.ydady += c->shade.dady;
}
const uint32_t mask =
GGL_ENABLE_DEPTH_TEST |
GGL_ENABLE_W |
GGL_ENABLE_FOG;
if (enables & mask) {
ci.ydzdy += c->shade.dzdy;
ci.ydwdy += c->shade.dwdy;
ci.ydfdy += c->shade.dfdy;
}
if ((enables & GGL_ENABLE_TMUS) && (!(enables & GGL_ENABLE_W))) {
for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) {
if (c->state.texture[i].enable) {
texture_iterators_t& ti = c->state.texture[i].iterators;
ti.ydsdy += ti.dsdy;
ti.ydtdy += ti.dtdy;
}
}
}
}
void step_y__nop(context_t* c)
{
c->iterators.y += 1;
c->iterators.ydzdy += c->shade.dzdy;
}
void step_y__smooth(context_t* c)
{
iterators_t& ci = c->iterators;
ci.y += 1;
ci.ydrdy += c->shade.drdy;
ci.ydgdy += c->shade.dgdy;
ci.ydbdy += c->shade.dbdy;
ci.ydady += c->shade.dady;
ci.ydzdy += c->shade.dzdy;
}
void step_y__w(context_t* c)
{
iterators_t& ci = c->iterators;
ci.y += 1;
ci.ydzdy += c->shade.dzdy;
ci.ydwdy += c->shade.dwdy;
}
void step_y__tmu(context_t* c)
{
iterators_t& ci = c->iterators;
ci.y += 1;
ci.ydzdy += c->shade.dzdy;
for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) {
if (c->state.texture[i].enable) {
texture_iterators_t& ti = c->state.texture[i].iterators;
ti.ydsdy += ti.dsdy;
ti.ydtdy += ti.dtdy;
}
}
}
// ----------------------------------------------------------------------------
#if 0
#pragma mark -
#endif
void scanline_perspective(context_t* c)
{
struct {
union {
struct {
int32_t s, sq;
int32_t t, tq;
};
struct {
int32_t v, q;
} st[2];
};
} tc[GGL_TEXTURE_UNIT_COUNT] __attribute__((aligned(16)));
// XXX: we should have a special case when dwdx = 0
// 32 pixels spans works okay. 16 is a lot better,
// but hey, it's a software renderer...
const uint32_t SPAN_BITS = 5;
const uint32_t ys = c->iterators.y;
const uint32_t xs = c->iterators.xl;
const uint32_t x1 = c->iterators.xr;
const uint32_t xc = x1 - xs;
uint32_t remainder = xc & ((1<<SPAN_BITS)-1);
uint32_t numSpans = xc >> SPAN_BITS;
const iterators_t& ci = c->iterators;
int32_t w0 = (xs * c->shade.dwdx) + ci.ydwdy;
int32_t q0 = gglRecipQ(w0, 30);
const int iwscale = 32 - gglClz(q0);
const int32_t dwdx = c->shade.dwdx << SPAN_BITS;
int32_t xl = c->iterators.xl;
// We process s & t with a loop to reduce the code size
// (and i-cache pressure).
for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) {
const texture_t& tmu = c->state.texture[i];
if (!tmu.enable) continue;
int32_t s = tmu.shade.is0 +
(tmu.shade.idsdy * ys) + (tmu.shade.idsdx * xs) +
((tmu.shade.idsdx + tmu.shade.idsdy)>>1);
int32_t t = tmu.shade.it0 +
(tmu.shade.idtdy * ys) + (tmu.shade.idtdx * xs) +
((tmu.shade.idtdx + tmu.shade.idtdy)>>1);
tc[i].s = s;
tc[i].t = t;
tc[i].sq = gglMulx(s, q0, iwscale);
tc[i].tq = gglMulx(t, q0, iwscale);
}
int32_t span = 0;
do {
int32_t w1;
if (ggl_likely(numSpans)) {
w1 = w0 + dwdx;
} else {
if (remainder) {
// finish off the scanline...
span = remainder;
w1 = (c->shade.dwdx * span) + w0;
} else {
break;
}
}
int32_t q1 = gglRecipQ(w1, 30);
for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) {
texture_t& tmu = c->state.texture[i];
if (!tmu.enable) continue;
texture_iterators_t& ti = tmu.iterators;
for (int j=0 ; j<2 ; j++) {
int32_t v = tc[i].st[j].v;
if (span) v += (tmu.shade.st[j].dx)*span;
else v += (tmu.shade.st[j].dx)<<SPAN_BITS;
const int32_t v0 = tc[i].st[j].q;
const int32_t v1 = gglMulx(v, q1, iwscale);
int32_t dvdx = v1 - v0;
if (span) dvdx /= span;
else dvdx >>= SPAN_BITS;
tc[i].st[j].v = v;
tc[i].st[j].q = v1;
const int scale = ti.st[j].scale + (iwscale - 30);
if (scale >= 0) {
ti.st[j].ydvdy = v0 << scale;
ti.st[j].dvdx = dvdx << scale;
} else {
ti.st[j].ydvdy = v0 >> -scale;
ti.st[j].dvdx = dvdx >> -scale;
}
}
generated_tex_vars_t& gen = c->generated_vars.texture[i];
gen.dsdx = ti.st[0].dvdx;
gen.dtdx = ti.st[1].dvdx;
}
c->iterators.xl = xl;
c->iterators.xr = xl = xl + (span ? span : (1<<SPAN_BITS));
w0 = w1;
q0 = q1;
c->span(c);
} while(numSpans--);
}
void scanline_perspective_single(context_t* c)
{
// 32 pixels spans works okay. 16 is a lot better,
// but hey, it's a software renderer...
const uint32_t SPAN_BITS = 5;
const uint32_t ys = c->iterators.y;
const uint32_t xs = c->iterators.xl;
const uint32_t x1 = c->iterators.xr;
const uint32_t xc = x1 - xs;
const iterators_t& ci = c->iterators;
int32_t w = (xs * c->shade.dwdx) + ci.ydwdy;
int32_t iw = gglRecipQ(w, 30);
const int iwscale = 32 - gglClz(iw);
const int i = 31 - gglClz(c->state.enabled_tmu);
generated_tex_vars_t& gen = c->generated_vars.texture[i];
texture_t& tmu = c->state.texture[i];
texture_iterators_t& ti = tmu.iterators;
const int sscale = ti.sscale + (iwscale - 30);
const int tscale = ti.tscale + (iwscale - 30);
int32_t s = tmu.shade.is0 +
(tmu.shade.idsdy * ys) + (tmu.shade.idsdx * xs) +
((tmu.shade.idsdx + tmu.shade.idsdy)>>1);
int32_t t = tmu.shade.it0 +
(tmu.shade.idtdy * ys) + (tmu.shade.idtdx * xs) +
((tmu.shade.idtdx + tmu.shade.idtdy)>>1);
int32_t s0 = gglMulx(s, iw, iwscale);
int32_t t0 = gglMulx(t, iw, iwscale);
int32_t xl = c->iterators.xl;
int32_t sq, tq, dsdx, dtdx;
int32_t premainder = xc & ((1<<SPAN_BITS)-1);
uint32_t numSpans = xc >> SPAN_BITS;
if (c->shade.dwdx == 0) {
// XXX: we could choose to do this if the error is small enough
numSpans = 0;
premainder = xc;
goto no_perspective;
}
if (premainder) {
w += c->shade.dwdx * premainder;
iw = gglRecipQ(w, 30);
no_perspective:
s += tmu.shade.idsdx * premainder;
t += tmu.shade.idtdx * premainder;
sq = gglMulx(s, iw, iwscale);
tq = gglMulx(t, iw, iwscale);
dsdx = (sq - s0) / premainder;
dtdx = (tq - t0) / premainder;
c->iterators.xl = xl;
c->iterators.xr = xl = xl + premainder;
goto finish;
}
while (numSpans--) {
w += c->shade.dwdx << SPAN_BITS;
s += tmu.shade.idsdx << SPAN_BITS;
t += tmu.shade.idtdx << SPAN_BITS;
iw = gglRecipQ(w, 30);
sq = gglMulx(s, iw, iwscale);
tq = gglMulx(t, iw, iwscale);
dsdx = (sq - s0) >> SPAN_BITS;
dtdx = (tq - t0) >> SPAN_BITS;
c->iterators.xl = xl;
c->iterators.xr = xl = xl + (1<<SPAN_BITS);
finish:
if (sscale >= 0) {
ti.ydsdy = s0 << sscale;
ti.dsdx = dsdx << sscale;
} else {
ti.ydsdy = s0 >>-sscale;
ti.dsdx = dsdx >>-sscale;
}
if (tscale >= 0) {
ti.ydtdy = t0 << tscale;
ti.dtdx = dtdx << tscale;
} else {
ti.ydtdy = t0 >>-tscale;
ti.dtdx = dtdx >>-tscale;
}
s0 = sq;
t0 = tq;
gen.dsdx = ti.dsdx;
gen.dtdx = ti.dtdx;
c->span(c);
}
}
// ----------------------------------------------------------------------------
void scanline_col32cb16blend(context_t* c)
{
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
union {
uint16_t* dst;
uint32_t* dst32;
};
dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y));
#if ((ANDROID_CODEGEN >= ANDROID_CODEGEN_ASM) && defined(__arm__))
#if defined(__ARM_HAVE_NEON) && BYTE_ORDER == LITTLE_ENDIAN
scanline_col32cb16blend_neon(dst, &(c->packed8888), ct);
#else // defined(__ARM_HAVE_NEON) && BYTE_ORDER == LITTLE_ENDIAN
scanline_col32cb16blend_arm(dst, GGL_RGBA_TO_HOST(c->packed8888), ct);
#endif // defined(__ARM_HAVE_NEON) && BYTE_ORDER == LITTLE_ENDIAN
#else
uint32_t s = GGL_RGBA_TO_HOST(c->packed8888);
int sA = (s>>24);
int f = 0x100 - (sA + (sA>>7));
while (ct--) {
uint16_t d = *dst;
int dR = (d>>11)&0x1f;
int dG = (d>>5)&0x3f;
int dB = (d)&0x1f;
int sR = (s >> ( 3))&0x1F;
int sG = (s >> ( 8+2))&0x3F;
int sB = (s >> (16+3))&0x1F;
sR += (f*dR)>>8;
sG += (f*dG)>>8;
sB += (f*dB)>>8;
*dst++ = uint16_t((sR<<11)|(sG<<5)|sB);
}
#endif
}
void scanline_t32cb16(context_t* c)
{
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
union {
uint16_t* dst;
uint32_t* dst32;
};
dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y));
surface_t* tex = &(c->state.texture[0].surface);
const int32_t u = (c->state.texture[0].shade.is0>>16) + x;
const int32_t v = (c->state.texture[0].shade.it0>>16) + y;
uint32_t *src = reinterpret_cast<uint32_t*>(tex->data)+(u+(tex->stride*v));
int sR, sG, sB;
uint32_t s, d;
if (ct==1 || uint32_t(dst)&2) {
last_one:
s = GGL_RGBA_TO_HOST( *src++ );
*dst++ = convertAbgr8888ToRgb565(s);
ct--;
}
while (ct >= 2) {
#if BYTE_ORDER == BIG_ENDIAN
s = GGL_RGBA_TO_HOST( *src++ );
d = convertAbgr8888ToRgb565_hi16(s);
s = GGL_RGBA_TO_HOST( *src++ );
d |= convertAbgr8888ToRgb565(s);
#else
s = GGL_RGBA_TO_HOST( *src++ );
d = convertAbgr8888ToRgb565(s);
s = GGL_RGBA_TO_HOST( *src++ );
d |= convertAbgr8888ToRgb565(s) << 16;
#endif
*dst32++ = d;
ct -= 2;
}
if (ct > 0) {
goto last_one;
}
}
void scanline_t32cb16blend(context_t* c)
{
#if ((ANDROID_CODEGEN >= ANDROID_CODEGEN_ASM) && defined(__arm__))
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
uint16_t* dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y));
surface_t* tex = &(c->state.texture[0].surface);
const int32_t u = (c->state.texture[0].shade.is0>>16) + x;
const int32_t v = (c->state.texture[0].shade.it0>>16) + y;
uint32_t *src = reinterpret_cast<uint32_t*>(tex->data)+(u+(tex->stride*v));
scanline_t32cb16blend_arm(dst, src, ct);
#else
dst_iterator16 di(c);
horz_iterator32 hi(c);
blender_32to16 bl(c);
while (di.count--) {
uint32_t s = hi.get_pixel32();
bl.write(s, di.dst);
di.dst++;
}
#endif
}
void scanline_t32cb16blend_srca(context_t* c)
{
dst_iterator16 di(c);
horz_iterator32 hi(c);
blender_32to16_srcA blender(c);
while (di.count--) {
uint32_t s = hi.get_pixel32();
blender.write(s,di.dst);
di.dst++;
}
}
void scanline_t16cb16blend_clamp_mod(context_t* c)
{
const int a = c->iterators.ydady >> (GGL_COLOR_BITS-8);
if (a == 0) {
return;
}
if (a == 255) {
scanline_t16cb16_clamp(c);
return;
}
dst_iterator16 di(c);
blender_16to16_modulate blender(c);
clamp_iterator ci(c);
while (di.count--) {
uint16_t s = ci.get_pixel16();
blender.write(s, di.dst);
di.dst++;
}
}
void scanline_memcpy(context_t* c)
{
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
const GGLFormat* fp = &(c->formats[cb->format]);
uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) +
(x + (cb->stride * y)) * fp->size;
surface_t* tex = &(c->state.texture[0].surface);
const int32_t u = (c->state.texture[0].shade.is0>>16) + x;
const int32_t v = (c->state.texture[0].shade.it0>>16) + y;
uint8_t *src = reinterpret_cast<uint8_t*>(tex->data) +
(u + (tex->stride * v)) * fp->size;
const size_t size = ct * fp->size;
memcpy(dst, src, size);
}
void scanline_memset8(context_t* c)
{
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) + (x+(cb->stride*y));
uint32_t packed = c->packed;
memset(dst, packed, ct);
}
void scanline_memset16(context_t* c)
{
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
uint16_t* dst = reinterpret_cast<uint16_t*>(cb->data) + (x+(cb->stride*y));
uint32_t packed = c->packed;
android_memset16(dst, packed, ct*2);
}
void scanline_memset32(context_t* c)
{
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
uint32_t* dst = reinterpret_cast<uint32_t*>(cb->data) + (x+(cb->stride*y));
uint32_t packed = GGL_HOST_TO_RGBA(c->packed);
android_memset32(dst, packed, ct*4);
}
void scanline_clear(context_t* c)
{
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
const GGLFormat* fp = &(c->formats[cb->format]);
uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) +
(x + (cb->stride * y)) * fp->size;
const size_t size = ct * fp->size;
memset(dst, 0, size);
}
void scanline_set(context_t* c)
{
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
const GGLFormat* fp = &(c->formats[cb->format]);
uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) +
(x + (cb->stride * y)) * fp->size;
const size_t size = ct * fp->size;
memset(dst, 0xFF, size);
}
void scanline_noop(context_t* c)
{
}
void rect_generic(context_t* c, size_t yc)
{
do {
c->scanline(c);
c->step_y(c);
} while (--yc);
}
void rect_memcpy(context_t* c, size_t yc)
{
int32_t x = c->iterators.xl;
size_t ct = c->iterators.xr - x;
int32_t y = c->iterators.y;
surface_t* cb = &(c->state.buffers.color);
const GGLFormat* fp = &(c->formats[cb->format]);
uint8_t* dst = reinterpret_cast<uint8_t*>(cb->data) +
(x + (cb->stride * y)) * fp->size;
surface_t* tex = &(c->state.texture[0].surface);
const int32_t u = (c->state.texture[0].shade.is0>>16) + x;
const int32_t v = (c->state.texture[0].shade.it0>>16) + y;
uint8_t *src = reinterpret_cast<uint8_t*>(tex->data) +
(u + (tex->stride * v)) * fp->size;
if (cb->stride == tex->stride && ct == size_t(cb->stride)) {
memcpy(dst, src, ct * fp->size * yc);
} else {
const size_t size = ct * fp->size;
const size_t dbpr = cb->stride * fp->size;
const size_t sbpr = tex->stride * fp->size;
do {
memcpy(dst, src, size);
dst += dbpr;
src += sbpr;
} while (--yc);
}
}
// ----------------------------------------------------------------------------
}; // namespace android
Reference in a new issue View git blame Copy permalink