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LibSoftGPU: Use FloatVector4 pixel format for Image

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This increases memory usage for textures 4-fold, but allows us to
completely remove calls to `(un)pack_color` in a very hot loop.
This commit is contained in:
Jelle Raaijmakers 2022-04-29 14:54:54 +02:00 • committed by Andreas Kling
parent 6090e79191
commit 9a1364d784
2 changed files with 120 additions and 124 deletions
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117
Userland/Libraries/LibSoftGPU/Image.cpp
View file

@ -9,10 +9,123 @@
namespace SoftGPU {
static constexpr FloatVector4 unpack_color(void const* ptr, GPU::ImageFormat format)
{
constexpr auto one_over_255 = 1.0f / 255;
switch (format) {
case GPU::ImageFormat::RGB888: {
auto rgb = reinterpret_cast<u8 const*>(ptr);
return {
rgb[0] * one_over_255,
rgb[1] * one_over_255,
rgb[2] * one_over_255,
1.0f,
};
}
case GPU::ImageFormat::BGR888: {
auto bgr = reinterpret_cast<u8 const*>(ptr);
return {
bgr[2] * one_over_255,
bgr[1] * one_over_255,
bgr[0] * one_over_255,
1.0f,
};
}
case GPU::ImageFormat::RGBA8888: {
auto rgba = *reinterpret_cast<u32 const*>(ptr);
return {
(rgba & 0xff) * one_over_255,
((rgba >> 8) & 0xff) * one_over_255,
((rgba >> 16) & 0xff) * one_over_255,
((rgba >> 24) & 0xff) * one_over_255,
};
}
case GPU::ImageFormat::BGRA8888: {
auto bgra = *reinterpret_cast<u32 const*>(ptr);
return {
((bgra >> 16) & 0xff) * one_over_255,
((bgra >> 8) & 0xff) * one_over_255,
(bgra & 0xff) * one_over_255,
((bgra >> 24) & 0xff) * one_over_255,
};
}
case GPU::ImageFormat::RGB565: {
auto rgb = *reinterpret_cast<u16 const*>(ptr);
return {
((rgb >> 11) & 0x1f) / 31.f,
((rgb >> 5) & 0x3f) / 63.f,
(rgb & 0x1f) / 31.f,
1.0f
};
}
case GPU::ImageFormat::L8: {
auto luminance = *reinterpret_cast<u8 const*>(ptr);
auto clamped_luminance = luminance * one_over_255;
return {
clamped_luminance,
clamped_luminance,
clamped_luminance,
1.0f,
};
}
case GPU::ImageFormat::L8A8: {
auto luminance_and_alpha = reinterpret_cast<u8 const*>(ptr);
auto clamped_luminance = luminance_and_alpha[0] * one_over_255;
return {
clamped_luminance,
clamped_luminance,
clamped_luminance,
luminance_and_alpha[1] * one_over_255,
};
}
default:
VERIFY_NOT_REACHED();
}
}
static constexpr void pack_color(FloatVector4 const& color, void* ptr, GPU::ImageFormat format)
{
auto r = static_cast<u8>(clamp(color.x(), 0.0f, 1.0f) * 255);
auto g = static_cast<u8>(clamp(color.y(), 0.0f, 1.0f) * 255);
auto b = static_cast<u8>(clamp(color.z(), 0.0f, 1.0f) * 255);
auto a = static_cast<u8>(clamp(color.w(), 0.0f, 1.0f) * 255);
switch (format) {
case GPU::ImageFormat::RGB888:
reinterpret_cast<u8*>(ptr)[0] = r;
reinterpret_cast<u8*>(ptr)[1] = g;
reinterpret_cast<u8*>(ptr)[2] = b;
return;
case GPU::ImageFormat::BGR888:
reinterpret_cast<u8*>(ptr)[2] = b;
reinterpret_cast<u8*>(ptr)[1] = g;
reinterpret_cast<u8*>(ptr)[0] = r;
return;
case GPU::ImageFormat::RGBA8888:
*reinterpret_cast<u32*>(ptr) = r | (g << 8) | (b << 16) | (a << 24);
return;
case GPU::ImageFormat::BGRA8888:
*reinterpret_cast<u32*>(ptr) = b | (g << 8) | (r << 16) | (a << 24);
return;
case GPU::ImageFormat::RGB565:
*reinterpret_cast<u16*>(ptr) = (r & 0x1f) | ((g & 0x3f) << 5) | ((b & 0x1f) << 11);
return;
case GPU::ImageFormat::L8:
*reinterpret_cast<u8*>(ptr) = r;
return;
case GPU::ImageFormat::L8A8:
reinterpret_cast<u8*>(ptr)[0] = r;
reinterpret_cast<u8*>(ptr)[1] = a;
return;
default:
VERIFY_NOT_REACHED();
}
}
Image::Image(void* const ownership_token, unsigned width, unsigned height, unsigned depth, unsigned max_levels, unsigned layers)
: GPU::Image(ownership_token)
, m_num_layers(layers)
, m_mipmap_buffers(FixedArray<RefPtr<Typed3DBuffer<GPU::ColorType>>>::must_create_but_fixme_should_propagate_errors(layers * max_levels))
, m_mipmap_buffers(FixedArray<RefPtr<Typed3DBuffer<FloatVector4>>>::must_create_but_fixme_should_propagate_errors(layers * max_levels))
{
VERIFY(width > 0);
VERIFY(height > 0);
@ -27,7 +140,7 @@ Image::Image(void* const ownership_token, unsigned width, unsigned height, unsig
unsigned level;
for (level = 0; level < max_levels; ++level) {
for (unsigned layer = 0; layer < layers; ++layer)
m_mipmap_buffers[layer * layers + level] = MUST(Typed3DBuffer<GPU::ColorType>::try_create(width, height, depth));
m_mipmap_buffers[layer * layers + level] = MUST(Typed3DBuffer<FloatVector4>::try_create(width, height, depth));
if (width <= 1 && height <= 1 && depth <= 1)
break;