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Merge pull request #617 from bunnei/framebuffer-rgb565

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GPU: Added RGB565/RGB8 framebuffer support and various cleanups.
This commit is contained in:
bunnei 2015-03-03 19:11:07 -05:00
commit 510246ddce
9 changed files with 214 additions and 195 deletions
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2
src/citra_qt/debugger/graphics_cmdlists.cpp
View file

@ -66,7 +66,7 @@ TextureInfoDockWidget::TextureInfoDockWidget(const Pica::DebugUtils::TextureInfo
QComboBox* format_choice = new QComboBox;
format_choice->addItem(tr("RGBA8"));
format_choice->addItem(tr("RGB8"));
format_choice->addItem(tr("RGBA5551"));
format_choice->addItem(tr("RGB5A1"));
format_choice->addItem(tr("RGB565"));
format_choice->addItem(tr("RGBA4"));
format_choice->addItem(tr("IA8"));

88
src/citra_qt/debugger/graphics_framebuffer.cpp
View file

@ -46,7 +46,7 @@ GraphicsFramebufferWidget::GraphicsFramebufferWidget(std::shared_ptr<Pica::Debug
framebuffer_format_control = new QComboBox;
framebuffer_format_control->addItem(tr("RGBA8"));
framebuffer_format_control->addItem(tr("RGB8"));
framebuffer_format_control->addItem(tr("RGBA5551"));
framebuffer_format_control->addItem(tr("RGB5A1"));
framebuffer_format_control->addItem(tr("RGB565"));
framebuffer_format_control->addItem(tr("RGBA4"));
@ -199,66 +199,40 @@ void GraphicsFramebufferWidget::OnUpdate()
// TODO: Unify this decoding code with the texture decoder
u32 bytes_per_pixel = GPU::Regs::BytesPerPixel(GPU::Regs::PixelFormat(framebuffer_format));
switch (framebuffer_format) {
case Format::RGBA8:
{
QImage decoded_image(framebuffer_width, framebuffer_height, QImage::Format_ARGB32);
u8* color_buffer = Memory::GetPointer(Pica::PAddrToVAddr(framebuffer_address));
for (unsigned int y = 0; y < framebuffer_height; ++y) {
for (unsigned int x = 0; x < framebuffer_width; ++x) {
const u32 coarse_y = y & ~7;
u32 offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * framebuffer_width * bytes_per_pixel;
u8* value = color_buffer + offset;
QImage decoded_image(framebuffer_width, framebuffer_height, QImage::Format_ARGB32);
u8* color_buffer = Memory::GetPointer(Pica::PAddrToVAddr(framebuffer_address));
for (unsigned int y = 0; y < framebuffer_height; ++y) {
for (unsigned int x = 0; x < framebuffer_width; ++x) {
const u32 coarse_y = y & ~7;
u32 offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * framebuffer_width * bytes_per_pixel;
const u8* pixel = color_buffer + offset;
Math::Vec4<u8> color = { 0, 0, 0, 0 };
decoded_image.setPixel(x, y, qRgba(value[3], value[2], value[1], 255/*value >> 24*/));
switch (framebuffer_format) {
case Format::RGBA8:
color = Color::DecodeRGBA8(pixel);
break;
case Format::RGB8:
color = Color::DecodeRGB8(pixel);
break;
case Format::RGB5A1:
color = Color::DecodeRGB5A1(pixel);
break;
case Format::RGB565:
color = Color::DecodeRGB565(pixel);
break;
case Format::RGBA4:
color = Color::DecodeRGBA4(pixel);
break;
default:
qDebug() << "Unknown fb color format " << static_cast<int>(framebuffer_format);
break;
}
decoded_image.setPixel(x, y, qRgba(color.r(), color.g(), color.b(), 255));
}
pixmap = QPixmap::fromImage(decoded_image);
break;
}
case Format::RGB8:
{
QImage decoded_image(framebuffer_width, framebuffer_height, QImage::Format_ARGB32);
u8* color_buffer = Memory::GetPointer(Pica::PAddrToVAddr(framebuffer_address));
for (unsigned int y = 0; y < framebuffer_height; ++y) {
for (unsigned int x = 0; x < framebuffer_width; ++x) {
const u32 coarse_y = y & ~7;
u32 offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * framebuffer_width * bytes_per_pixel;
u8* pixel_pointer = color_buffer + offset;
decoded_image.setPixel(x, y, qRgba(pixel_pointer[0], pixel_pointer[1], pixel_pointer[2], 255/*value >> 24*/));
}
}
pixmap = QPixmap::fromImage(decoded_image);
break;
}
case Format::RGBA5551:
{
QImage decoded_image(framebuffer_width, framebuffer_height, QImage::Format_ARGB32);
u8* color_buffer = Memory::GetPointer(Pica::PAddrToVAddr(framebuffer_address));
for (unsigned int y = 0; y < framebuffer_height; ++y) {
for (unsigned int x = 0; x < framebuffer_width; ++x) {
const u32 coarse_y = y & ~7;
u32 offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * framebuffer_width * bytes_per_pixel;
u16 value = *(u16*)(color_buffer + offset);
u8 r = Color::Convert5To8((value >> 11) & 0x1F);
u8 g = Color::Convert5To8((value >> 6) & 0x1F);
u8 b = Color::Convert5To8((value >> 1) & 0x1F);
u8 a = Color::Convert1To8(value & 1);
decoded_image.setPixel(x, y, qRgba(r, g, b, 255/*a*/));
}
}
pixmap = QPixmap::fromImage(decoded_image);
break;
}
default:
qDebug() << "Unknown fb color format " << static_cast<int>(framebuffer_format);
break;
}
pixmap = QPixmap::fromImage(decoded_image);
framebuffer_address_control->SetValue(framebuffer_address);
framebuffer_width_control->setValue(framebuffer_width);

2
src/citra_qt/debugger/graphics_framebuffer.h
View file

@ -29,7 +29,7 @@ class GraphicsFramebufferWidget : public BreakPointObserverDock {
enum class Format {
RGBA8 = 0,
RGB8 = 1,
RGBA5551 = 2,
RGB5A1 = 2,
RGB565 = 3,
RGBA4 = 4,
};

75
src/core/hw/gpu.cpp
View file

@ -113,8 +113,8 @@ inline void Write(u32 addr, const T data) {
{
const auto& config = g_regs.display_transfer_config;
if (config.trigger & 1) {
u8* source_pointer = Memory::GetPointer(Memory::PhysicalToVirtualAddress(config.GetPhysicalInputAddress()));
u8* dest_pointer = Memory::GetPointer(Memory::PhysicalToVirtualAddress(config.GetPhysicalOutputAddress()));
u8* src_pointer = Memory::GetPointer(Memory::PhysicalToVirtualAddress(config.GetPhysicalInputAddress()));
u8* dst_pointer = Memory::GetPointer(Memory::PhysicalToVirtualAddress(config.GetPhysicalOutputAddress()));
unsigned horizontal_scale = (config.scale_horizontally != 0) ? 2 : 1;
unsigned vertical_scale = (config.scale_vertically != 0) ? 2 : 1;
@ -125,7 +125,7 @@ inline void Write(u32 addr, const T data) {
if (config.raw_copy) {
// Raw copies do not perform color conversion nor tiled->linear / linear->tiled conversions
// TODO(Subv): Verify if raw copies perform scaling
memcpy(dest_pointer, source_pointer, config.output_width * config.output_height *
memcpy(dst_pointer, src_pointer, config.output_width * config.output_height *
GPU::Regs::BytesPerPixel(config.output_format));
LOG_TRACE(HW_GPU, "DisplayTriggerTransfer: 0x%08x bytes from 0x%08x(%ux%u)-> 0x%08x(%ux%u), flags 0x%08X, Raw copy",
@ -142,9 +142,7 @@ inline void Write(u32 addr, const T data) {
// right now we're just skipping the extra pixels.
for (u32 y = 0; y < output_height; ++y) {
for (u32 x = 0; x < output_width; ++x) {
struct {
int r, g, b, a;
} source_color = { 0, 0, 0, 0 };
Math::Vec4<u8> src_color = { 0, 0, 0, 0 };
u32 scaled_x = x * horizontal_scale;
u32 scaled_y = y * vertical_scale;
@ -170,77 +168,54 @@ inline void Write(u32 addr, const T data) {
dst_offset = (x + y * output_width) * dst_bytes_per_pixel;
}
const u8* src_pixel = src_pointer + src_offset;
switch (config.input_format) {
case Regs::PixelFormat::RGBA8:
{
u8* srcptr = source_pointer + src_offset;
source_color.r = srcptr[3]; // red
source_color.g = srcptr[2]; // green
source_color.b = srcptr[1]; // blue
source_color.a = srcptr[0]; // alpha
src_color = Color::DecodeRGBA8(src_pixel);
break;
case Regs::PixelFormat::RGB8:
src_color = Color::DecodeRGB8(src_pixel);
break;
case Regs::PixelFormat::RGB565:
src_color = Color::DecodeRGB565(src_pixel);
break;
}
case Regs::PixelFormat::RGB5A1:
{
u16 srcval = *(u16*)(source_pointer + src_offset);
source_color.r = Color::Convert5To8((srcval >> 11) & 0x1F); // red
source_color.g = Color::Convert5To8((srcval >> 6) & 0x1F); // green
source_color.b = Color::Convert5To8((srcval >> 1) & 0x1F); // blue
source_color.a = Color::Convert1To8(srcval & 0x1); // alpha
src_color = Color::DecodeRGB5A1(src_pixel);
break;
}
case Regs::PixelFormat::RGBA4:
{
u16 srcval = *(u16*)(source_pointer + src_offset);
source_color.r = Color::Convert4To8((srcval >> 12) & 0xF); // red
source_color.g = Color::Convert4To8((srcval >> 8) & 0xF); // green
source_color.b = Color::Convert4To8((srcval >> 4) & 0xF); // blue
source_color.a = Color::Convert4To8( srcval & 0xF); // alpha
src_color = Color::DecodeRGBA4(src_pixel);
break;
}
default:
LOG_ERROR(HW_GPU, "Unknown source framebuffer format %x", config.input_format.Value());
break;
}
u8* dst_pixel = dst_pointer + dst_offset;
switch (config.output_format) {
case Regs::PixelFormat::RGBA8:
{
u8* dstptr = dest_pointer + dst_offset;
dstptr[3] = source_color.r;
dstptr[2] = source_color.g;
dstptr[1] = source_color.b;
dstptr[0] = source_color.a;
Color::EncodeRGBA8(src_color, dst_pixel);
break;
}
case Regs::PixelFormat::RGB8:
{
u8* dstptr = dest_pointer + dst_offset;
dstptr[2] = source_color.r; // red
dstptr[1] = source_color.g; // green
dstptr[0] = source_color.b; // blue
Color::EncodeRGB8(src_color, dst_pixel);
break;
case Regs::PixelFormat::RGB565:
Color::EncodeRGB565(src_color, dst_pixel);
break;
}
case Regs::PixelFormat::RGB5A1:
{
u16* dstptr = (u16*)(dest_pointer + dst_offset);
*dstptr = ((source_color.r >> 3) << 11) | ((source_color.g >> 3) << 6)
| ((source_color.b >> 3) << 1) | ( source_color.a >> 7);
Color::EncodeRGB5A1(src_color, dst_pixel);
break;
}
case Regs::PixelFormat::RGBA4:
{
u16* dstptr = (u16*)(dest_pointer + dst_offset);
*dstptr = ((source_color.r >> 4) << 12) | ((source_color.g >> 4) << 8)
| ((source_color.b >> 4) << 4) | ( source_color.a >> 4);
Color::EncodeRGBA4(src_color, dst_pixel);
break;
}
default:
LOG_ERROR(HW_GPU, "Unknown destination framebuffer format %x", config.output_format.Value());

1
src/video_core/CMakeLists.txt
View file

@ -19,6 +19,7 @@ set(HEADERS
renderer_opengl/gl_shaders.h
renderer_opengl/renderer_opengl.h
clipper.h
color.h
command_processor.h
gpu_debugger.h
math.h

121
src/video_core/color.h
View file

@ -5,47 +5,152 @@
#pragma once
#include "common/common_types.h"
#include "video_core/math.h"
namespace Color {
/// Convert a 1-bit color component to 8 bit
static inline u8 Convert1To8(u8 value) {
inline u8 Convert1To8(u8 value) {
return value * 255;
}
/// Convert a 4-bit color component to 8 bit
static inline u8 Convert4To8(u8 value) {
inline u8 Convert4To8(u8 value) {
return (value << 4) | value;
}
/// Convert a 5-bit color component to 8 bit
static inline u8 Convert5To8(u8 value) {
inline u8 Convert5To8(u8 value) {
return (value << 3) | (value >> 2);
}
/// Convert a 6-bit color component to 8 bit
static inline u8 Convert6To8(u8 value) {
inline u8 Convert6To8(u8 value) {
return (value << 2) | (value >> 4);
}
/// Convert a 8-bit color component to 1 bit
static inline u8 Convert8To1(u8 value) {
inline u8 Convert8To1(u8 value) {
return value >> 7;
}
/// Convert a 8-bit color component to 4 bit
static inline u8 Convert8To4(u8 value) {
inline u8 Convert8To4(u8 value) {
return value >> 4;
}
/// Convert a 8-bit color component to 5 bit
static inline u8 Convert8To5(u8 value) {
inline u8 Convert8To5(u8 value) {
return value >> 3;
}
/// Convert a 8-bit color component to 6 bit
static inline u8 Convert8To6(u8 value) {
inline u8 Convert8To6(u8 value) {
return value >> 2;
}
/**
* Decode a color stored in RGBA8 format
* @param bytes Pointer to encoded source color
* @return Result color decoded as Math::Vec4<u8>
*/
inline const Math::Vec4<u8> DecodeRGBA8(const u8* bytes) {
return { bytes[3], bytes[2], bytes[1], bytes[0] };
}
/**
* Decode a color stored in RGB8 format
* @param bytes Pointer to encoded source color
* @return Result color decoded as Math::Vec4<u8>
*/
inline const Math::Vec4<u8> DecodeRGB8(const u8* bytes) {
return { bytes[2], bytes[1], bytes[0], 255 };
}
/**
* Decode a color stored in RGB565 format
* @param bytes Pointer to encoded source color
* @return Result color decoded as Math::Vec4<u8>
*/
inline const Math::Vec4<u8> DecodeRGB565(const u8* bytes) {
const u16_le pixel = *reinterpret_cast<const u16_le*>(bytes);
return { Convert5To8((pixel >> 11) & 0x1F), Convert6To8((pixel >> 5) & 0x3F),
Convert5To8(pixel & 0x1F), 255 };
}
/**
* Decode a color stored in RGB5A1 format
* @param bytes Pointer to encoded source color
* @return Result color decoded as Math::Vec4<u8>
*/
inline const Math::Vec4<u8> DecodeRGB5A1(const u8* bytes) {
const u16_le pixel = *reinterpret_cast<const u16_le*>(bytes);
return { Convert5To8((pixel >> 11) & 0x1F), Convert5To8((pixel >> 6) & 0x1F),
Convert5To8((pixel >> 1) & 0x1F), Convert1To8(pixel & 0x1) };
}
/**
* Decode a color stored in RGBA4 format
* @param bytes Pointer to encoded source color
* @return Result color decoded as Math::Vec4<u8>
*/
inline const Math::Vec4<u8> DecodeRGBA4(const u8* bytes) {
const u16_le pixel = *reinterpret_cast<const u16_le*>(bytes);
return { Convert4To8((pixel >> 12) & 0xF), Convert4To8((pixel >> 8) & 0xF),
Convert4To8((pixel >> 4) & 0xF), Convert4To8(pixel & 0xF) };
}
/**
* Encode a color as RGBA8 format
* @param color Source color to encode
* @param bytes Destination pointer to store encoded color
*/
inline void EncodeRGBA8(const Math::Vec4<u8>& color, u8* bytes) {
bytes[3] = color.r();
bytes[2] = color.g();
bytes[1] = color.b();
bytes[0] = color.a();
}
/**
* Encode a color as RGB8 format
* @param color Source color to encode
* @param bytes Destination pointer to store encoded color
*/
inline void EncodeRGB8(const Math::Vec4<u8>& color, u8* bytes) {
bytes[2] = color.r();
bytes[1] = color.g();
bytes[0] = color.b();
}
/**
* Encode a color as RGB565 format
* @param color Source color to encode
* @param bytes Destination pointer to store encoded color
*/
inline void EncodeRGB565(const Math::Vec4<u8>& color, u8* bytes) {
*reinterpret_cast<u16_le*>(bytes) = (Convert8To5(color.r()) << 11) |
(Convert8To6(color.g()) << 5) | Convert8To5(color.b());
}
/**
* Encode a color as RGB5A1 format
* @param color Source color to encode
* @param bytes Destination pointer to store encoded color
*/
inline void EncodeRGB5A1(const Math::Vec4<u8>& color, u8* bytes) {
*reinterpret_cast<u16_le*>(bytes) = (Convert8To5(color.r()) << 11) |
(Convert8To5(color.g()) << 6) | (Convert8To5(color.b()) << 1) | Convert8To1(color.a());
}
/**
* Encode a color as RGBA4 format
* @param color Source color to encode
* @param bytes Destination pointer to store encoded color
*/
inline void EncodeRGBA4(const Math::Vec4<u8>& color, u8* bytes) {
*reinterpret_cast<u16_le*>(bytes) = (Convert8To4(color.r()) << 12) |
(Convert8To4(color.g()) << 8) | (Convert8To4(color.b()) << 4) | Convert8To4(color.a());
}
} // namespace

36
src/video_core/debug_utils/debug_utils.cpp
View file

@ -321,44 +321,32 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
switch (info.format) {
case Regs::TextureFormat::RGBA8:
{
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 4);
return { source_ptr[3], source_ptr[2], source_ptr[1], disable_alpha ? (u8)255 : source_ptr[0] };
auto res = Color::DecodeRGBA8(source + VideoCore::GetMortonOffset(x, y, 4));
return { res.r(), res.g(), res.b(), disable_alpha ? 255 : res.a() };
}
case Regs::TextureFormat::RGB8:
{
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 3);
return { source_ptr[2], source_ptr[1], source_ptr[0], 255 };
auto res = Color::DecodeRGB8(source + VideoCore::GetMortonOffset(x, y, 3));
return { res.r(), res.g(), res.b(), 255 };
}
case Regs::TextureFormat::RGBA5551:
case Regs::TextureFormat::RGB5A1:
{
const u16 source_ptr = *(const u16*)(source + VideoCore::GetMortonOffset(x, y, 2));
u8 r = (source_ptr >> 11) & 0x1F;
u8 g = ((source_ptr) >> 6) & 0x1F;
u8 b = (source_ptr >> 1) & 0x1F;
u8 a = source_ptr & 1;
return Math::MakeVec<u8>(Color::Convert5To8(r), Color::Convert5To8(g),
Color::Convert5To8(b), disable_alpha ? 255 : Color::Convert1To8(a));
auto res = Color::DecodeRGB5A1(source + VideoCore::GetMortonOffset(x, y, 2));
return { res.r(), res.g(), res.b(), disable_alpha ? 255 : res.a() };
}
case Regs::TextureFormat::RGB565:
{
const u16 source_ptr = *(const u16*)(source + VideoCore::GetMortonOffset(x, y, 2));
u8 r = Color::Convert5To8((source_ptr >> 11) & 0x1F);
u8 g = Color::Convert6To8(((source_ptr) >> 5) & 0x3F);
u8 b = Color::Convert5To8((source_ptr) & 0x1F);
return Math::MakeVec<u8>(r, g, b, 255);
auto res = Color::DecodeRGB565(source + VideoCore::GetMortonOffset(x, y, 2));
return { res.r(), res.g(), res.b(), 255 };
}
case Regs::TextureFormat::RGBA4:
{
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 2);
u8 r = Color::Convert4To8(source_ptr[1] >> 4);
u8 g = Color::Convert4To8(source_ptr[1] & 0xF);
u8 b = Color::Convert4To8(source_ptr[0] >> 4);
u8 a = Color::Convert4To8(source_ptr[0] & 0xF);
return { r, g, b, disable_alpha ? (u8)255 : a };
auto res = Color::DecodeRGBA4(source + VideoCore::GetMortonOffset(x, y, 2));
return { res.r(), res.g(), res.b(), disable_alpha ? 255 : res.a() };
}
case Regs::TextureFormat::IA8:
@ -369,7 +357,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
// 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]};
return { source_ptr[1], source_ptr[1], source_ptr[1], source_ptr[0] };
}
}

6
src/video_core/pica.h
View file

@ -145,7 +145,7 @@ struct Regs {
enum class TextureFormat : u32 {
RGBA8 = 0,
RGB8 = 1,
RGBA5551 = 2,
RGB5A1 = 2,
RGB565 = 3,
RGBA4 = 4,
IA8 = 5,
@ -167,7 +167,7 @@ struct Regs {
case TextureFormat::RGB8:
return 6;
case TextureFormat::RGBA5551:
case TextureFormat::RGB5A1:
case TextureFormat::RGB565:
case TextureFormat::RGBA4:
case TextureFormat::IA8:
@ -413,7 +413,7 @@ struct Regs {
enum ColorFormat : u32 {
RGBA8 = 0,
RGB8 = 1,
RGBA5551 = 2,
RGB5A1 = 2,
RGB565 = 3,
RGBA4 = 4,
};

78
src/video_core/rasterizer.cpp
View file

@ -22,7 +22,6 @@ namespace Rasterizer {
static void DrawPixel(int x, int y, const Math::Vec4<u8>& color) {
const PAddr addr = registers.framebuffer.GetColorBufferPhysicalAddress();
u8* color_buffer = Memory::GetPointer(PAddrToVAddr(addr));
// Similarly to textures, the render framebuffer is laid out from bottom to top, too.
// NOTE: The framebuffer height register contains the actual FB height minus one.
@ -31,35 +30,28 @@ static void DrawPixel(int x, int y, const Math::Vec4<u8>& color) {
const u32 coarse_y = y & ~7;
u32 bytes_per_pixel = GPU::Regs::BytesPerPixel(GPU::Regs::PixelFormat(registers.framebuffer.color_format.Value()));
u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * registers.framebuffer.width * bytes_per_pixel;
u8* dst_pixel = Memory::GetPointer(PAddrToVAddr(addr)) + dst_offset;
switch (registers.framebuffer.color_format) {
case registers.framebuffer.RGBA8:
{
u8* pixel = color_buffer + dst_offset;
pixel[3] = color.r();
pixel[2] = color.g();
pixel[1] = color.b();
pixel[0] = color.a();
Color::EncodeRGBA8(color, dst_pixel);
break;
case registers.framebuffer.RGB8:
Color::EncodeRGB8(color, dst_pixel);
break;
case registers.framebuffer.RGB5A1:
Color::EncodeRGB5A1(color, dst_pixel);
break;
case registers.framebuffer.RGB565:
Color::EncodeRGB565(color, dst_pixel);
break;
}
case registers.framebuffer.RGBA4:
{
u8* pixel = color_buffer + dst_offset;
pixel[1] = (color.r() & 0xF0) | (color.g() >> 4);
pixel[0] = (color.b() & 0xF0) | (color.a() >> 4);
Color::EncodeRGBA4(color, dst_pixel);
break;
}
case registers.framebuffer.RGBA5551:
{
u16_le* pixel = (u16_le*)(color_buffer + dst_offset);
*pixel = (Color::Convert8To5(color.r()) << 11) |
(Color::Convert8To5(color.g()) << 6) |
(Color::Convert8To5(color.b()) << 1) |
Color::Convert8To1(color.a());
break;
}
default:
LOG_CRITICAL(Render_Software, "Unknown framebuffer color format %x", registers.framebuffer.color_format.Value());
@ -69,45 +61,29 @@ static void DrawPixel(int x, int y, const Math::Vec4<u8>& color) {
static const Math::Vec4<u8> GetPixel(int x, int y) {
const PAddr addr = registers.framebuffer.GetColorBufferPhysicalAddress();
u8* color_buffer = Memory::GetPointer(PAddrToVAddr(addr));
y = (registers.framebuffer.height - y);
const u32 coarse_y = y & ~7;
u32 bytes_per_pixel = GPU::Regs::BytesPerPixel(GPU::Regs::PixelFormat(registers.framebuffer.color_format.Value()));
u32 src_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * registers.framebuffer.width * bytes_per_pixel;
Math::Vec4<u8> ret;
u8* src_pixel = Memory::GetPointer(PAddrToVAddr(addr)) + src_offset;
switch (registers.framebuffer.color_format) {
case registers.framebuffer.RGBA8:
{
u8* pixel = color_buffer + src_offset;
ret.r() = pixel[3];
ret.g() = pixel[2];
ret.b() = pixel[1];
ret.a() = pixel[0];
return ret;
}
return Color::DecodeRGBA8(src_pixel);
case registers.framebuffer.RGB8:
return Color::DecodeRGB8(src_pixel);
case registers.framebuffer.RGB5A1:
return Color::DecodeRGB5A1(src_pixel);
case registers.framebuffer.RGB565:
return Color::DecodeRGB565(src_pixel);
case registers.framebuffer.RGBA4:
{
u8* pixel = color_buffer + src_offset;
ret.r() = Color::Convert4To8(pixel[1] >> 4);
ret.g() = Color::Convert4To8(pixel[1] & 0x0F);
ret.b() = Color::Convert4To8(pixel[0] >> 4);
ret.a() = Color::Convert4To8(pixel[0] & 0x0F);
return ret;
}
case registers.framebuffer.RGBA5551:
{
u16_le pixel = *(u16_le*)(color_buffer + src_offset);
ret.r() = Color::Convert5To8((pixel >> 11) & 0x1F);
ret.g() = Color::Convert5To8((pixel >> 6) & 0x1F);
ret.b() = Color::Convert5To8((pixel >> 1) & 0x1F);
ret.a() = Color::Convert1To8(pixel & 0x1);
return ret;
}
return Color::DecodeRGBA4(src_pixel);
default:
LOG_CRITICAL(Render_Software, "Unknown framebuffer color format %x", registers.framebuffer.color_format.Value());