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GPU/SW: Use new 5-to-8 converters for RGBA8 display

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This commit is contained in:
Connor McLaughlin 2021-03-18 12:55:02 +10:00
parent 6c05413220
commit b13c51a2e2
8 changed files with 34 additions and 68 deletions
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4
src/core/gpu.cpp
View file

@ -1245,7 +1245,7 @@ void GPU::ReadVRAM(u32 x, u32 y, u32 width, u32 height) {}
void GPU::FillVRAM(u32 x, u32 y, u32 width, u32 height, u32 color)
{
const u16 color16 = RGBA8888ToRGBA5551(color);
const u16 color16 = VRAMRGBA8888ToRGBA5551(color);
if ((x + width) <= VRAM_WIDTH && !IsInterlacedRenderingEnabled())
{
for (u32 yoffs = 0; yoffs < height; yoffs++)
@ -1507,7 +1507,7 @@ bool GPU::DumpVRAMToFile(const char* filename, u32 width, u32 height, u32 stride
u16 src_col;
std::memcpy(&src_col, row_ptr_in, sizeof(u16));
row_ptr_in += sizeof(u16);
*(ptr_out++) = RGBA5551ToRGBA8888(remove_alpha ? (src_col | u16(0x8000)) : src_col);
*(ptr_out++) = VRAMRGBA5551ToRGBA8888(remove_alpha ? (src_col | u16(0x8000)) : src_col);
}
ptr_in += stride;

21
src/core/gpu.h
View file

@ -175,27 +175,6 @@ protected:
}
ALWAYS_INLINE static constexpr TickCount SystemTicksToGPUTicks(TickCount sysclk_ticks) { return sysclk_ticks << 1; }
// Helper/format conversion functions - constants from https://stackoverflow.com/a/9069480
ALWAYS_INLINE static constexpr u32 Convert5To8(u32 color) { return (((color * 527u) + 23u) >> 6); }
ALWAYS_INLINE static constexpr u32 Convert8To5(u32 color) { return (((color * 249u) + 1014u) >> 11); }
static constexpr u32 RGBA5551ToRGBA8888(u32 color)
{
const u32 r = Convert5To8(color & 31u);
const u32 g = Convert5To8((color >> 5) & 31u);
const u32 b = Convert5To8((color >> 10) & 31u);
const u32 a = ((color >> 15) != 0) ? 255 : 0;
return ZeroExtend32(r) | (ZeroExtend32(g) << 8) | (ZeroExtend32(b) << 16) | (ZeroExtend32(a) << 24);
}
static constexpr u16 RGBA8888ToRGBA5551(u32 color)
{
const u32 r = Convert8To5(color & 0xFFu);
const u32 g = Convert8To5((color >> 8) & 0xFFu);
const u32 b = Convert8To5((color >> 16) & 0xFFu);
const u32 a = ((color >> 24) & 0x01u);
return Truncate16(r | (g << 5) | (b << 10) | (a << 15));
}
static constexpr std::tuple<u8, u8> UnpackTexcoord(u16 texcoord)
{
return std::make_tuple(static_cast<u8>(texcoord), static_cast<u8>(texcoord >> 8));

2
src/core/gpu_hw.cpp
View file

@ -885,7 +885,7 @@ GPU_HW::VRAMFillUBOData GPU_HW::GetVRAMFillUBOData(u32 x, u32 y, u32 width, u32
{
// drop precision unless true colour is enabled
if (!m_true_color)
color = RGBA5551ToRGBA8888(RGBA8888ToRGBA5551(color));
color = VRAMRGBA5551ToRGBA8888(VRAMRGBA8888ToRGBA5551(color));
VRAMFillUBOData uniforms;
std::tie(uniforms.u_fill_color[0], uniforms.u_fill_color[1], uniforms.u_fill_color[2], uniforms.u_fill_color[3]) =

5
src/core/gpu_hw_opengl.cpp
View file

@ -1031,7 +1031,8 @@ void GPU_HW_OpenGL::FillVRAM(u32 x, u32 y, u32 width, u32 height, u32 color)
// fast path when not using interlaced rendering
if (!IsInterlacedRenderingEnabled())
{
const auto [r, g, b, a] = RGBA8ToFloat(m_true_color ? color : RGBA5551ToRGBA8888(RGBA8888ToRGBA5551(color)));
const auto [r, g, b, a] =
RGBA8ToFloat(m_true_color ? color : VRAMRGBA5551ToRGBA8888(VRAMRGBA8888ToRGBA5551(color)));
glClearColor(r, g, b, a);
IsGLES() ? glClearDepthf(a) : glClearDepth(a);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@ -1128,7 +1129,7 @@ void GPU_HW_OpenGL::UpdateVRAM(u32 x, u32 y, u32 width, u32 height, const void*
u16 src_col;
std::memcpy(&src_col, source_row_ptr, sizeof(src_col));
source_row_ptr += sizeof(src_col);
*(dest_ptr++) = RGBA5551ToRGBA8888(src_col | mask_or);
*(dest_ptr++) = VRAMRGBA5551ToRGBA8888(src_col | mask_or);
}
source_ptr -= source_stride;

24
src/core/gpu_sw.cpp
View file

@ -115,30 +115,16 @@ ALWAYS_INLINE u16 VRAM16ToOutput<HostDisplayPixelFormat::RGB565, u16>(u16 value)
template<>
ALWAYS_INLINE u32 VRAM16ToOutput<HostDisplayPixelFormat::RGBA8, u32>(u16 value)
{
u8 r = Truncate8(value & 31);
u8 g = Truncate8((value >> 5) & 31);
u8 b = Truncate8((value >> 10) & 31);
// 00012345 -> 1234545
b = (b << 3) | (b & 0b111);
g = (g << 3) | (g & 0b111);
r = (r << 3) | (r & 0b111);
return ZeroExtend32(r) | (ZeroExtend32(g) << 8) | (ZeroExtend32(b) << 16) | (0xFF000000u);
return VRAMRGBA5551ToRGBA8888(value);
}
template<>
ALWAYS_INLINE u32 VRAM16ToOutput<HostDisplayPixelFormat::BGRA8, u32>(u16 value)
{
u8 r = Truncate8(value & 31);
u8 g = Truncate8((value >> 5) & 31);
u8 b = Truncate8((value >> 10) & 31);
// 00012345 -> 1234545
b = (b << 3) | (b & 0b111);
g = (g << 3) | (g & 0b111);
r = (r << 3) | (r & 0b111);
const u32 value32 = ZeroExtend32(value);
const u32 r = VRAMConvert5To8(value32 & 31u);
const u32 g = VRAMConvert5To8((value32 >> 5) & 31u);
const u32 b = VRAMConvert5To8((value32 >> 10) & 31u);
return ZeroExtend32(b) | (ZeroExtend32(g) << 8) | (ZeroExtend32(r) << 16) | (0xFF000000u);
}

2
src/core/gpu_sw_backend.cpp
View file

@ -769,7 +769,7 @@ GPU_SW_Backend::GetDrawRectangleFunction(bool texture_enable, bool raw_texture_e
void GPU_SW_Backend::FillVRAM(u32 x, u32 y, u32 width, u32 height, u32 color, GPUBackendCommandParameters params)
{
const u16 color16 = RGBA8888ToRGBA5551(color);
const u16 color16 = VRAMRGBA8888ToRGBA5551(color);
if ((x + width) <= VRAM_WIDTH && !params.interlaced_rendering)
{
for (u32 yoffs = 0; yoffs < height; yoffs++)

40
src/core/gpu_types.h
View file

@ -114,31 +114,31 @@ union GPURenderCommand
}
};
// Helper/format conversion functions.
static constexpr u32 RGBA5551ToRGBA8888(u16 color)
// Helper/format conversion functions - constants from https://stackoverflow.com/a/9069480
ALWAYS_INLINE static constexpr u32 VRAMConvert5To8(u32 color)
{
u8 r = Truncate8(color & 31);
u8 g = Truncate8((color >> 5) & 31);
u8 b = Truncate8((color >> 10) & 31);
u8 a = Truncate8((color >> 15) & 1);
// 00012345 -> 1234545
b = (b << 3) | (b & 0b111);
g = (g << 3) | (g & 0b111);
r = (r << 3) | (r & 0b111);
a = a ? 255 : 0;
return (((color * 527u) + 23u) >> 6);
}
ALWAYS_INLINE static constexpr u32 VRAMConvert8To5(u32 color)
{
return (((color * 249u) + 1014u) >> 11);
}
ALWAYS_INLINE static constexpr u32 VRAMRGBA5551ToRGBA8888(u32 color)
{
const u32 r = VRAMConvert5To8(color & 31u);
const u32 g = VRAMConvert5To8((color >> 5) & 31u);
const u32 b = VRAMConvert5To8((color >> 10) & 31u);
const u32 a = ((color >> 15) != 0) ? 255 : 0;
return ZeroExtend32(r) | (ZeroExtend32(g) << 8) | (ZeroExtend32(b) << 16) | (ZeroExtend32(a) << 24);
}
static constexpr u16 RGBA8888ToRGBA5551(u32 color)
ALWAYS_INLINE static constexpr u16 VRAMRGBA8888ToRGBA5551(u32 color)
{
const u16 r = Truncate16((color >> 3) & 0x1Fu);
const u16 g = Truncate16((color >> 11) & 0x1Fu);
const u16 b = Truncate16((color >> 19) & 0x1Fu);
const u16 a = Truncate16((color >> 31) & 0x01u);
return r | (g << 5) | (b << 10) | (a << 15);
const u32 r = VRAMConvert8To5(color & 0xFFu);
const u32 g = VRAMConvert8To5((color >> 8) & 0xFFu);
const u32 b = VRAMConvert8To5((color >> 16) & 0xFFu);
const u32 a = ((color >> 24) & 0x01u);
return Truncate16(r | (g << 5) | (b << 10) | (a << 15));
}
union GPUVertexPosition

4
src/core/texture_replacements.cpp
View file

@ -15,7 +15,7 @@ Log_SetChannel(TextureReplacements);
TextureReplacements g_texture_replacements;
static constexpr u32 RGBA5551ToRGBA8888(u16 color)
static constexpr u32 VRAMRGBA5551ToRGBA8888(u16 color)
{
u8 r = Truncate8(color & 31);
u8 g = Truncate8((color >> 5) & 31);
@ -90,7 +90,7 @@ void TextureReplacements::DumpVRAMWrite(u32 width, u32 height, const void* pixel
{
for (u32 x = 0; x < width; x++)
{
image.SetPixel(x, y, RGBA5551ToRGBA8888(*src_pixels));
image.SetPixel(x, y, VRAMRGBA5551ToRGBA8888(*src_pixels));
src_pixels++;
}
}