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Merge pull request #2414 from yuriks/texture-decode

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Texture decoding cleanups
This commit is contained in:
Yuri Kunde Schlesner 2017-02-04 12:59:33 -08:00 committed by GitHub
commit 18c981b996
12 changed files with 482 additions and 318 deletions
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10
src/citra_qt/debugger/graphics/graphics_cmdlists.cpp
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@ -20,13 +20,14 @@
#include "video_core/debug_utils/debug_utils.h"
#include "video_core/pica.h"
#include "video_core/pica_state.h"
#include "video_core/texture/texture_decode.h"
namespace {
QImage LoadTexture(const u8* src, const Pica::DebugUtils::TextureInfo& info) {
QImage LoadTexture(const u8* src, const Pica::Texture::TextureInfo& info) {
QImage decoded_image(info.width, info.height, QImage::Format_ARGB32);
for (int y = 0; y < info.height; ++y) {
for (int x = 0; x < info.width; ++x) {
Math::Vec4<u8> color = Pica::DebugUtils::LookupTexture(src, x, y, info, true);
Math::Vec4<u8> color = Pica::Texture::LookupTexture(src, x, y, info, true);
decoded_image.setPixel(x, y, qRgba(color.r(), color.g(), color.b(), color.a()));
}
}
@ -36,9 +37,10 @@ QImage LoadTexture(const u8* src, const Pica::DebugUtils::TextureInfo& info) {
class TextureInfoWidget : public QWidget {
public:
TextureInfoWidget(const u8* src, const Pica::DebugUtils::TextureInfo& info,
TextureInfoWidget(const u8* src, const Pica::Texture::TextureInfo& info,
QWidget* parent = nullptr)
: QWidget(parent) {
QLabel* image_widget = new QLabel;
QPixmap image_pixmap = QPixmap::fromImage(LoadTexture(src, info));
image_pixmap = image_pixmap.scaled(200, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
@ -160,7 +162,7 @@ void GPUCommandListWidget::SetCommandInfo(const QModelIndex& index) {
const auto config = texture.config;
const auto format = texture.format;
const auto info = Pica::DebugUtils::TextureInfo::FromPicaRegister(config, format);
const auto info = Pica::Texture::TextureInfo::FromPicaRegister(config, format);
const u8* src = Memory::GetPhysicalPointer(config.GetPhysicalAddress());
new_info_widget = new TextureInfoWidget(src, info);
}

20
src/citra_qt/debugger/graphics/graphics_surface.cpp
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@ -18,6 +18,7 @@
#include "core/memory.h"
#include "video_core/pica.h"
#include "video_core/pica_state.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
SurfacePicture::SurfacePicture(QWidget* parent, GraphicsSurfaceWidget* surface_widget_)
@ -512,7 +513,7 @@ void GraphicsSurfaceWidget::OnUpdate() {
}
const auto texture = Pica::g_state.regs.GetTextures()[texture_index];
auto info = Pica::DebugUtils::TextureInfo::FromPicaRegister(texture.config, texture.format);
auto info = Pica::Texture::TextureInfo::FromPicaRegister(texture.config, texture.format);
surface_address = info.physical_address;
surface_width = info.width;
@ -567,28 +568,27 @@ void GraphicsSurfaceWidget::OnUpdate() {
surface_picture_label->show();
unsigned nibbles_per_pixel = GraphicsSurfaceWidget::NibblesPerPixel(surface_format);
unsigned stride = nibbles_per_pixel * surface_width / 2;
// We handle depth formats here because DebugUtils only supports TextureFormats
if (surface_format <= Format::MaxTextureFormat) {
// Generate a virtual texture
Pica::DebugUtils::TextureInfo info;
Pica::Texture::TextureInfo info;
info.physical_address = surface_address;
info.width = surface_width;
info.height = surface_height;
info.format = static_cast<Pica::Regs::TextureFormat>(surface_format);
info.stride = stride;
info.SetDefaultStride();
for (unsigned int y = 0; y < surface_height; ++y) {
for (unsigned int x = 0; x < surface_width; ++x) {
Math::Vec4<u8> color = Pica::DebugUtils::LookupTexture(buffer, x, y, info, true);
Math::Vec4<u8> color = Pica::Texture::LookupTexture(buffer, x, y, info, true);
decoded_image.setPixel(x, y, qRgba(color.r(), color.g(), color.b(), color.a()));
}
}
} else {
// We handle depth formats here because DebugUtils only supports TextureFormats
// TODO(yuriks): Convert to newer tile-based addressing
unsigned nibbles_per_pixel = GraphicsSurfaceWidget::NibblesPerPixel(surface_format);
unsigned stride = nibbles_per_pixel * surface_width / 2;
ASSERT_MSG(nibbles_per_pixel >= 2,
"Depth decoder only supports formats with at least one byte per pixel");

36
src/video_core/CMakeLists.txt
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@ -1,36 +1,30 @@
set(SRCS
clipper.cpp
command_processor.cpp
debug_utils/debug_utils.cpp
pica.cpp
primitive_assembly.cpp
rasterizer.cpp
renderer_base.cpp
renderer_opengl/gl_rasterizer.cpp
renderer_opengl/gl_rasterizer_cache.cpp
renderer_opengl/gl_shader_gen.cpp
renderer_opengl/gl_shader_util.cpp
renderer_opengl/gl_state.cpp
renderer_opengl/renderer_opengl.cpp
debug_utils/debug_utils.cpp
clipper.cpp
command_processor.cpp
pica.cpp
primitive_assembly.cpp
rasterizer.cpp
renderer_base.cpp
shader/shader.cpp
shader/shader_interpreter.cpp
swrasterizer.cpp
texture/etc1.cpp
texture/texture_decode.cpp
vertex_loader.cpp
video_core.cpp
)
set(HEADERS
debug_utils/debug_utils.h
renderer_opengl/gl_rasterizer.h
renderer_opengl/gl_rasterizer_cache.h
renderer_opengl/gl_resource_manager.h
renderer_opengl/gl_shader_gen.h
renderer_opengl/gl_shader_util.h
renderer_opengl/gl_state.h
renderer_opengl/pica_to_gl.h
renderer_opengl/renderer_opengl.h
clipper.h
command_processor.h
debug_utils/debug_utils.h
gpu_debugger.h
pica.h
pica_state.h
@ -39,10 +33,20 @@ set(HEADERS
rasterizer.h
rasterizer_interface.h
renderer_base.h
renderer_opengl/gl_rasterizer.h
renderer_opengl/gl_rasterizer_cache.h
renderer_opengl/gl_resource_manager.h
renderer_opengl/gl_shader_gen.h
renderer_opengl/gl_shader_util.h
renderer_opengl/gl_state.h
renderer_opengl/pica_to_gl.h
renderer_opengl/renderer_opengl.h
shader/debug_data.h
shader/shader.h
shader/shader_interpreter.h
swrasterizer.h
texture/etc1.h
texture/texture_decode.h
utils.h
vertex_loader.h
video_core.h

256
src/video_core/debug_utils/debug_utils.cpp
View File

@ -35,6 +35,7 @@
#include "video_core/rasterizer_interface.h"
#include "video_core/renderer_base.h"
#include "video_core/shader/shader.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
#include "video_core/video_core.h"
@ -315,257 +316,6 @@ std::unique_ptr<PicaTrace> FinishPicaTracing() {
return ret;
}
const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo& info,
bool disable_alpha) {
const unsigned int coarse_x = x & ~7;
const unsigned int coarse_y = y & ~7;
if (info.format != Regs::TextureFormat::ETC1 && info.format != Regs::TextureFormat::ETC1A4) {
// TODO(neobrain): Fix code design to unify vertical block offsets!
source += coarse_y * info.stride;
}
// TODO: Assert that width/height are multiples of block dimensions
switch (info.format) {
case Regs::TextureFormat::RGBA8: {
auto res = Color::DecodeRGBA8(source + VideoCore::GetMortonOffset(x, y, 4));
return {res.r(), res.g(), res.b(), static_cast<u8>(disable_alpha ? 255 : res.a())};
}
case Regs::TextureFormat::RGB8: {
auto res = Color::DecodeRGB8(source + VideoCore::GetMortonOffset(x, y, 3));
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGB5A1: {
auto res = Color::DecodeRGB5A1(source + VideoCore::GetMortonOffset(x, y, 2));
return {res.r(), res.g(), res.b(), static_cast<u8>(disable_alpha ? 255 : res.a())};
}
case Regs::TextureFormat::RGB565: {
auto res = Color::DecodeRGB565(source + VideoCore::GetMortonOffset(x, y, 2));
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGBA4: {
auto res = Color::DecodeRGBA4(source + VideoCore::GetMortonOffset(x, y, 2));
return {res.r(), res.g(), res.b(), static_cast<u8>(disable_alpha ? 255 : res.a())};
}
case Regs::TextureFormat::IA8: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 2);
if (disable_alpha) {
// Show intensity as red, alpha as green
return {source_ptr[1], source_ptr[0], 0, 255};
} else {
return {source_ptr[1], source_ptr[1], source_ptr[1], source_ptr[0]};
}
}
case Regs::TextureFormat::RG8: {
auto res = Color::DecodeRG8(source + VideoCore::GetMortonOffset(x, y, 2));
return {res.r(), res.g(), 0, 255};
}
case Regs::TextureFormat::I8: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
return {*source_ptr, *source_ptr, *source_ptr, 255};
}
case Regs::TextureFormat::A8: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
if (disable_alpha) {
return {*source_ptr, *source_ptr, *source_ptr, 255};
} else {
return {0, 0, 0, *source_ptr};
}
}
case Regs::TextureFormat::IA4: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
u8 i = Color::Convert4To8(((*source_ptr) & 0xF0) >> 4);
u8 a = Color::Convert4To8((*source_ptr) & 0xF);
if (disable_alpha) {
// Show intensity as red, alpha as green
return {i, a, 0, 255};
} else {
return {i, i, i, a};
}
}
case Regs::TextureFormat::I4: {
u32 morton_offset = VideoCore::GetMortonOffset(x, y, 1);
const u8* source_ptr = source + morton_offset / 2;
u8 i = (morton_offset % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
i = Color::Convert4To8(i);
return {i, i, i, 255};
}
case Regs::TextureFormat::A4: {
u32 morton_offset = VideoCore::GetMortonOffset(x, y, 1);
const u8* source_ptr = source + morton_offset / 2;
u8 a = (morton_offset % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
a = Color::Convert4To8(a);
if (disable_alpha) {
return {a, a, a, 255};
} else {
return {0, 0, 0, a};
}
}
case Regs::TextureFormat::ETC1:
case Regs::TextureFormat::ETC1A4: {
bool has_alpha = (info.format == Regs::TextureFormat::ETC1A4);
// ETC1 further subdivides each 8x8 tile into four 4x4 subtiles
const int subtile_width = 4;
const int subtile_height = 4;
int subtile_index = ((x / subtile_width) & 1) + 2 * ((y / subtile_height) & 1);
unsigned subtile_bytes = has_alpha ? 2 : 1; // TODO: Name...
const u64* source_ptr = (const u64*)(source + coarse_x * subtile_bytes * 4 +
coarse_y * subtile_bytes * 4 * (info.width / 8) +
subtile_index * subtile_bytes * 8);
u64 alpha = 0xFFFFFFFFFFFFFFFF;
if (has_alpha) {
alpha = *source_ptr;
source_ptr++;
}
union ETC1Tile {
// Each of these two is a collection of 16 bits (one per lookup value)
BitField<0, 16, u64> table_subindexes;
BitField<16, 16, u64> negation_flags;
unsigned GetTableSubIndex(unsigned index) const {
return (table_subindexes >> index) & 1;
}
bool GetNegationFlag(unsigned index) const {
return ((negation_flags >> index) & 1) == 1;
}
BitField<32, 1, u64> flip;
BitField<33, 1, u64> differential_mode;
BitField<34, 3, u64> table_index_2;
BitField<37, 3, u64> table_index_1;
union {
// delta value + base value
BitField<40, 3, s64> db;
BitField<43, 5, u64> b;
BitField<48, 3, s64> dg;
BitField<51, 5, u64> g;
BitField<56, 3, s64> dr;
BitField<59, 5, u64> r;
} differential;
union {
BitField<40, 4, u64> b2;
BitField<44, 4, u64> b1;
BitField<48, 4, u64> g2;
BitField<52, 4, u64> g1;
BitField<56, 4, u64> r2;
BitField<60, 4, u64> r1;
} separate;
const Math::Vec3<u8> GetRGB(int x, int y) const {
int texel = 4 * x + y;
if (flip)
std::swap(x, y);
// Lookup base value
Math::Vec3<int> ret;
if (differential_mode) {
ret.r() = static_cast<int>(differential.r);
ret.g() = static_cast<int>(differential.g);
ret.b() = static_cast<int>(differential.b);
if (x >= 2) {
ret.r() += static_cast<int>(differential.dr);
ret.g() += static_cast<int>(differential.dg);
ret.b() += static_cast<int>(differential.db);
}
ret.r() = Color::Convert5To8(ret.r());
ret.g() = Color::Convert5To8(ret.g());
ret.b() = Color::Convert5To8(ret.b());
} else {
if (x < 2) {
ret.r() = Color::Convert4To8(static_cast<u8>(separate.r1));
ret.g() = Color::Convert4To8(static_cast<u8>(separate.g1));
ret.b() = Color::Convert4To8(static_cast<u8>(separate.b1));
} else {
ret.r() = Color::Convert4To8(static_cast<u8>(separate.r2));
ret.g() = Color::Convert4To8(static_cast<u8>(separate.g2));
ret.b() = Color::Convert4To8(static_cast<u8>(separate.b2));
}
}
// Add modifier
unsigned table_index =
static_cast<int>((x < 2) ? table_index_1.Value() : table_index_2.Value());
static const std::array<std::array<u8, 2>, 8> etc1_modifier_table = {{
{{2, 8}},
{{5, 17}},
{{9, 29}},
{{13, 42}},
{{18, 60}},
{{24, 80}},
{{33, 106}},
{{47, 183}},
}};
int modifier = etc1_modifier_table.at(table_index).at(GetTableSubIndex(texel));
if (GetNegationFlag(texel))
modifier *= -1;
ret.r() = MathUtil::Clamp(ret.r() + modifier, 0, 255);
ret.g() = MathUtil::Clamp(ret.g() + modifier, 0, 255);
ret.b() = MathUtil::Clamp(ret.b() + modifier, 0, 255);
return ret.Cast<u8>();
}
} const* etc1_tile = reinterpret_cast<const ETC1Tile*>(source_ptr);
alpha >>= 4 * ((x & 3) * 4 + (y & 3));
return Math::MakeVec(etc1_tile->GetRGB(x & 3, y & 3),
disable_alpha ? (u8)255 : Color::Convert4To8(alpha & 0xF));
}
default:
LOG_ERROR(HW_GPU, "Unknown texture format: %x", (u32)info.format);
DEBUG_ASSERT(false);
return {};
}
}
TextureInfo TextureInfo::FromPicaRegister(const Regs::TextureConfig& config,
const Regs::TextureFormat& format) {
TextureInfo info;
info.physical_address = config.GetPhysicalAddress();
info.width = config.width;
info.height = config.height;
info.format = format;
info.stride = Pica::Regs::NibblesPerPixel(info.format) * info.width / 2;
return info;
}
#ifdef HAVE_PNG
// Adapter functions to libpng to write/flush to File::IOFile instances.
static void WriteIOFile(png_structp png_ptr, png_bytep data, png_size_t length) {
@ -642,12 +392,12 @@ void DumpTexture(const Pica::Regs::TextureConfig& texture_config, u8* data) {
buf = new u8[row_stride * texture_config.height];
for (unsigned y = 0; y < texture_config.height; ++y) {
for (unsigned x = 0; x < texture_config.width; ++x) {
TextureInfo info;
Pica::Texture::TextureInfo info;
info.width = texture_config.width;
info.height = texture_config.height;
info.stride = row_stride;
info.format = g_state.regs.texture0_format;
Math::Vec4<u8> texture_color = LookupTexture(data, x, y, info);
Math::Vec4<u8> texture_color = Pica::Texture::LookupTexture(data, x, y, info);
buf[3 * x + y * row_stride] = texture_color.r();
buf[3 * x + y * row_stride + 1] = texture_color.g();
buf[3 * x + y * row_stride + 2] = texture_color.b();

25
src/video_core/debug_utils/debug_utils.h
View File

@ -205,31 +205,6 @@ inline bool IsPicaTracing() {
void OnPicaRegWrite(PicaTrace::Write write);
std::unique_ptr<PicaTrace> FinishPicaTracing();
struct TextureInfo {
PAddr physical_address;
int width;
int height;
int stride;
Pica::Regs::TextureFormat format;
static TextureInfo FromPicaRegister(const Pica::Regs::TextureConfig& config,
const Pica::Regs::TextureFormat& format);
};
/**
* Lookup texel located at the given coordinates and return an RGBA vector of its color.
* @param source Source pointer to read data from
* @param s,t Texture coordinates to read from
* @param info TextureInfo object describing the texture setup
* @param disable_alpha This is used for debug widgets which use this method to display textures
* without providing a good way to visualize alpha by themselves. If true, this will return 255 for
* the alpha component, and either drop the information entirely or store it in an "unused" color
* channel.
* @todo Eventually we should get rid of the disable_alpha parameter.
*/
const Math::Vec4<u8> LookupTexture(const u8* source, int s, int t, const TextureInfo& info,
bool disable_alpha = false);
void DumpTexture(const Pica::Regs::TextureConfig& texture_config, u8* data);
std::string GetTevStageConfigColorCombinerString(const Pica::Regs::TevStageConfig& tev_stage);

5
src/video_core/pica.h
View File

@ -275,8 +275,11 @@ struct Regs {
case TextureFormat::I8:
case TextureFormat::A8:
case TextureFormat::IA4:
default: // placeholder for yet unknown formats
return 2;
default: // placeholder for yet unknown formats
UNIMPLEMENTED();
return 0;
}
}

5
src/video_core/rasterizer.cpp
View File

@ -21,6 +21,7 @@
#include "video_core/pica_types.h"
#include "video_core/rasterizer.h"
#include "video_core/shader/shader.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
namespace Pica {
@ -579,10 +580,10 @@ static void ProcessTriangleInternal(const Shader::OutputVertex& v0, const Shader
u8* texture_data =
Memory::GetPhysicalPointer(texture.config.GetPhysicalAddress());
auto info =
DebugUtils::TextureInfo::FromPicaRegister(texture.config, texture.format);
Texture::TextureInfo::FromPicaRegister(texture.config, texture.format);
// TODO: Apply the min and mag filters to the texture
texture_color[i] = DebugUtils::LookupTexture(texture_data, s, t, info);
texture_color[i] = Texture::LookupTexture(texture_data, s, t, info);
#if PICA_DUMP_TEXTURES
DebugUtils::DumpTexture(texture.config, texture_data);
#endif

14
src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
View File

@ -17,10 +17,10 @@
#include "common/vector_math.h"
#include "core/frontend/emu_window.h"
#include "core/memory.h"
#include "video_core/debug_utils/debug_utils.h"
#include "video_core/pica_state.h"
#include "video_core/renderer_opengl/gl_rasterizer_cache.h"
#include "video_core/renderer_opengl/gl_state.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
#include "video_core/video_core.h"
@ -339,17 +339,16 @@ CachedSurface* RasterizerCacheOpenGL::GetSurface(const CachedSurface& params, bo
std::vector<Math::Vec4<u8>> tex_buffer(params.width * params.height);
Pica::DebugUtils::TextureInfo tex_info;
Pica::Texture::TextureInfo tex_info;
tex_info.width = params.width;
tex_info.height = params.height;
tex_info.stride =
params.width * CachedSurface::GetFormatBpp(params.pixel_format) / 8;
tex_info.format = (Pica::Regs::TextureFormat)params.pixel_format;
tex_info.SetDefaultStride();
tex_info.physical_address = params.addr;
for (unsigned y = 0; y < params.height; ++y) {
for (unsigned x = 0; x < params.width; ++x) {
tex_buffer[x + params.width * y] = Pica::DebugUtils::LookupTexture(
tex_buffer[x + params.width * y] = Pica::Texture::LookupTexture(
texture_src_data, x, params.height - 1 - y, tex_info);
}
}
@ -512,8 +511,9 @@ CachedSurface* RasterizerCacheOpenGL::GetSurfaceRect(const CachedSurface& params
CachedSurface* RasterizerCacheOpenGL::GetTextureSurface(
const Pica::Regs::FullTextureConfig& config) {
Pica::DebugUtils::TextureInfo info =
Pica::DebugUtils::TextureInfo::FromPicaRegister(config.config, config.format);
Pica::Texture::TextureInfo info =
Pica::Texture::TextureInfo::FromPicaRegister(config.config, config.format);
CachedSurface params;
params.addr = info.physical_address;

124
src/video_core/texture/etc1.cpp Normal file
View File

@ -0,0 +1,124 @@
// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include "common/bit_field.h"
#include "common/color.h"
#include "common/common_types.h"
#include "common/math_util.h"
#include "common/vector_math.h"
#include "video_core/texture/etc1.h"
namespace Pica {
namespace Texture {
namespace {
constexpr std::array<u8[2], 8> etc1_modifier_table = {{
{2, 8}, {5, 17}, {9, 29}, {13, 42}, {18, 60}, {24, 80}, {33, 106}, {47, 183},
}};
union ETC1Tile {
u64 raw;
// Each of these two is a collection of 16 bits (one per lookup value)
BitField<0, 16, u64> table_subindexes;
BitField<16, 16, u64> negation_flags;
unsigned GetTableSubIndex(unsigned index) const {
return (table_subindexes >> index) & 1;
}
bool GetNegationFlag(unsigned index) const {
return ((negation_flags >> index) & 1) == 1;
}
BitField<32, 1, u64> flip;
BitField<33, 1, u64> differential_mode;
BitField<34, 3, u64> table_index_2;
BitField<37, 3, u64> table_index_1;
union {
// delta value + base value
BitField<40, 3, s64> db;
BitField<43, 5, u64> b;
BitField<48, 3, s64> dg;
BitField<51, 5, u64> g;
BitField<56, 3, s64> dr;
BitField<59, 5, u64> r;
} differential;
union {
BitField<40, 4, u64> b2;
BitField<44, 4, u64> b1;
BitField<48, 4, u64> g2;
BitField<52, 4, u64> g1;
BitField<56, 4, u64> r2;
BitField<60, 4, u64> r1;
} separate;
const Math::Vec3<u8> GetRGB(unsigned int x, unsigned int y) const {
int texel = 4 * x + y;
if (flip)
std::swap(x, y);
// Lookup base value
Math::Vec3<int> ret;
if (differential_mode) {
ret.r() = static_cast<int>(differential.r);
ret.g() = static_cast<int>(differential.g);
ret.b() = static_cast<int>(differential.b);
if (x >= 2) {
ret.r() += static_cast<int>(differential.dr);
ret.g() += static_cast<int>(differential.dg);
ret.b() += static_cast<int>(differential.db);
}
ret.r() = Color::Convert5To8(ret.r());
ret.g() = Color::Convert5To8(ret.g());
ret.b() = Color::Convert5To8(ret.b());
} else {
if (x < 2) {
ret.r() = Color::Convert4To8(static_cast<u8>(separate.r1));
ret.g() = Color::Convert4To8(static_cast<u8>(separate.g1));
ret.b() = Color::Convert4To8(static_cast<u8>(separate.b1));
} else {
ret.r() = Color::Convert4To8(static_cast<u8>(separate.r2));
ret.g() = Color::Convert4To8(static_cast<u8>(separate.g2));
ret.b() = Color::Convert4To8(static_cast<u8>(separate.b2));
}
}
// Add modifier
unsigned table_index =
static_cast<int>((x < 2) ? table_index_1.Value() : table_index_2.Value());
int modifier = etc1_modifier_table[table_index][GetTableSubIndex(texel)];
if (GetNegationFlag(texel))
modifier *= -1;
ret.r() = MathUtil::Clamp(ret.r() + modifier, 0, 255);
ret.g() = MathUtil::Clamp(ret.g() + modifier, 0, 255);
ret.b() = MathUtil::Clamp(ret.b() + modifier, 0, 255);
return ret.Cast<u8>();
}
};
} // anonymous namespace
Math::Vec3<u8> SampleETC1Subtile(u64 value, unsigned int x, unsigned int y) {
ETC1Tile tile{value};
return tile.GetRGB(x, y);
}
} // namespace Texture
} // namespace Pica

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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "common/common_types.h"
#include "common/vector_math.h"
namespace Pica {
namespace Texture {
Math::Vec3<u8> SampleETC1Subtile(u64 value, unsigned int x, unsigned int y);
} // namespace Texture
} // namespace Pica

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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "common/assert.h"
#include "common/color.h"
#include "common/logging/log.h"
#include "common/math_util.h"
#include "common/swap.h"
#include "common/vector_math.h"
#include "video_core/pica.h"
#include "video_core/texture/etc1.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
using TextureFormat = Pica::Regs::TextureFormat;
namespace Pica {
namespace Texture {
constexpr size_t TILE_SIZE = 8 * 8;
constexpr size_t ETC1_SUBTILES = 2 * 2;
size_t CalculateTileSize(TextureFormat format) {
switch (format) {
case TextureFormat::RGBA8:
return 4 * TILE_SIZE;
case TextureFormat::RGB8:
return 3 * TILE_SIZE;
case TextureFormat::RGB5A1:
case TextureFormat::RGB565:
case TextureFormat::RGBA4:
case TextureFormat::IA8:
case TextureFormat::RG8:
return 2 * TILE_SIZE;
case TextureFormat::I8:
case TextureFormat::A8:
case TextureFormat::IA4:
return 1 * TILE_SIZE;
case TextureFormat::I4:
case TextureFormat::A4:
return TILE_SIZE / 2;
case TextureFormat::ETC1:
return ETC1_SUBTILES * 8;
case TextureFormat::ETC1A4:
return ETC1_SUBTILES * 16;
default: // placeholder for yet unknown formats
UNIMPLEMENTED();
return 0;
}
}
Math::Vec4<u8> LookupTexture(const u8* source, unsigned int x, unsigned int y,
const TextureInfo& info, bool disable_alpha) {
// Coordinate in tiles
const unsigned int coarse_x = x / 8;
const unsigned int coarse_y = y / 8;
// Coordinate inside the tile
const unsigned int fine_x = x % 8;
const unsigned int fine_y = y % 8;
const u8* line = source + coarse_y * info.stride;
const u8* tile = line + coarse_x * CalculateTileSize(info.format);
return LookupTexelInTile(tile, fine_x, fine_y, info, disable_alpha);
}
Math::Vec4<u8> LookupTexelInTile(const u8* source, unsigned int x, unsigned int y,
const TextureInfo& info, bool disable_alpha) {
DEBUG_ASSERT(x < 8);
DEBUG_ASSERT(y < 8);
using VideoCore::MortonInterleave;
switch (info.format) {
case Regs::TextureFormat::RGBA8: {
auto res = Color::DecodeRGBA8(source + MortonInterleave(x, y) * 4);
return {res.r(), res.g(), res.b(), static_cast<u8>(disable_alpha ? 255 : res.a())};
}
case Regs::TextureFormat::RGB8: {
auto res = Color::DecodeRGB8(source + MortonInterleave(x, y) * 3);
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGB5A1: {
auto res = Color::DecodeRGB5A1(source + MortonInterleave(x, y) * 2);
return {res.r(), res.g(), res.b(), static_cast<u8>(disable_alpha ? 255 : res.a())};
}
case Regs::TextureFormat::RGB565: {
auto res = Color::DecodeRGB565(source + MortonInterleave(x, y) * 2);
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGBA4: {
auto res = Color::DecodeRGBA4(source + MortonInterleave(x, y) * 2);
return {res.r(), res.g(), res.b(), static_cast<u8>(disable_alpha ? 255 : res.a())};
}
case Regs::TextureFormat::IA8: {
const u8* source_ptr = source + MortonInterleave(x, y) * 2;
if (disable_alpha) {
// Show intensity as red, alpha as green
return {source_ptr[1], source_ptr[0], 0, 255};
} else {
return {source_ptr[1], source_ptr[1], source_ptr[1], source_ptr[0]};
}
}
case Regs::TextureFormat::RG8: {
auto res = Color::DecodeRG8(source + MortonInterleave(x, y) * 2);
return {res.r(), res.g(), 0, 255};
}
case Regs::TextureFormat::I8: {
const u8* source_ptr = source + MortonInterleave(x, y);
return {*source_ptr, *source_ptr, *source_ptr, 255};
}
case Regs::TextureFormat::A8: {
const u8* source_ptr = source + MortonInterleave(x, y);
if (disable_alpha) {
return {*source_ptr, *source_ptr, *source_ptr, 255};
} else {
return {0, 0, 0, *source_ptr};
}
}
case Regs::TextureFormat::IA4: {
const u8* source_ptr = source + MortonInterleave(x, y);
u8 i = Color::Convert4To8(((*source_ptr) & 0xF0) >> 4);
u8 a = Color::Convert4To8((*source_ptr) & 0xF);
if (disable_alpha) {
// Show intensity as red, alpha as green
return {i, a, 0, 255};
} else {
return {i, i, i, a};
}
}
case Regs::TextureFormat::I4: {
u32 morton_offset = MortonInterleave(x, y);
const u8* source_ptr = source + morton_offset / 2;
u8 i = (morton_offset % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
i = Color::Convert4To8(i);
return {i, i, i, 255};
}
case Regs::TextureFormat::A4: {
u32 morton_offset = MortonInterleave(x, y);
const u8* source_ptr = source + morton_offset / 2;
u8 a = (morton_offset % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
a = Color::Convert4To8(a);
if (disable_alpha) {
return {a, a, a, 255};
} else {
return {0, 0, 0, a};
}
}
case Regs::TextureFormat::ETC1:
case Regs::TextureFormat::ETC1A4: {
bool has_alpha = (info.format == Regs::TextureFormat::ETC1A4);
size_t subtile_size = has_alpha ? 16 : 8;
// ETC1 further subdivides each 8x8 tile into four 4x4 subtiles
constexpr unsigned int subtile_width = 4;
constexpr unsigned int subtile_height = 4;
unsigned int subtile_index = (x / subtile_width) + 2 * (y / subtile_height);
x %= subtile_width;
y %= subtile_height;
const u8* subtile_ptr = source + subtile_index * subtile_size;
u8 alpha = 255;
if (has_alpha) {
u64_le packed_alpha;
memcpy(&packed_alpha, subtile_ptr, sizeof(u64));
subtile_ptr += sizeof(u64);
alpha = Color::Convert4To8((packed_alpha >> (4 * (x * subtile_width + y))) & 0xF);
}
u64_le subtile_data;
memcpy(&subtile_data, subtile_ptr, sizeof(u64));
return Math::MakeVec(SampleETC1Subtile(subtile_data, x, y),
disable_alpha ? (u8)255 : alpha);
}
default:
LOG_ERROR(HW_GPU, "Unknown texture format: %x", (u32)info.format);
DEBUG_ASSERT(false);
return {};
}
}
TextureInfo TextureInfo::FromPicaRegister(const Regs::TextureConfig& config,
const Regs::TextureFormat& format) {
TextureInfo info;
info.physical_address = config.GetPhysicalAddress();
info.width = config.width;
info.height = config.height;
info.format = format;
info.SetDefaultStride();
return info;
}
} // namespace Texture
} // namespace Pica

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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "common/common_types.h"
#include "common/vector_math.h"
#include "video_core/pica.h"
namespace Pica {
namespace Texture {
/// Returns the byte size of a 8*8 tile of the specified texture format.
size_t CalculateTileSize(Pica::Regs::TextureFormat format);
struct TextureInfo {
PAddr physical_address;
unsigned int width;
unsigned int height;
ptrdiff_t stride;
Pica::Regs::TextureFormat format;
static TextureInfo FromPicaRegister(const Pica::Regs::TextureConfig& config,
const Pica::Regs::TextureFormat& format);
/// Calculates stride from format and width, assuming that the entire texture is contiguous.
void SetDefaultStride() {
stride = Pica::Texture::CalculateTileSize(format) * (width / 8);
}
};
/**
* Lookup texel located at the given coordinates and return an RGBA vector of its color.
* @param source Source pointer to read data from
* @param x,y Texture coordinates to read from
* @param info TextureInfo object describing the texture setup
* @param disable_alpha This is used for debug widgets which use this method to display textures
* without providing a good way to visualize alpha by themselves. If true, this will return 255 for
* the alpha component, and either drop the information entirely or store it in an "unused" color
* channel.
* @todo Eventually we should get rid of the disable_alpha parameter.
*/
Math::Vec4<u8> LookupTexture(const u8* source, unsigned int x, unsigned int y,
const TextureInfo& info, bool disable_alpha = false);
/**
* Looks up a texel from a single 8x8 texture tile.
*
* @param source Pointer to the beginning of the tile.
* @param x, y In-tile coordinates to read from. Must be < 8.
* @param info TextureInfo describing the texture format.
* @param disable_alpha Used for debugging. Sets the result alpha to 255 and either discards the
* real alpha or inserts it in an otherwise unused channel.
*/
Math::Vec4<u8> LookupTexelInTile(const u8* source, unsigned int x, unsigned int y,
const TextureInfo& info, bool disable_alpha);
} // namespace Texture
} // namespace Pica