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Updated SDL's YUV support, many thanks to Adrien Descamps

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New functions get and set the YUV colorspace conversion mode:
	SDL_SetYUVConversionMode()
	SDL_GetYUVConversionMode()
	SDL_GetYUVConversionModeForResolution()

SDL_ConvertPixels() converts between all supported RGB and YUV formats, with SSE acceleration for converting from planar YUV formats (YV12, NV12, etc) to common RGB/RGBA formats.

Added a new test program, testyuv, to verify correctness and speed of YUV conversion functionality.
This commit is contained in:
Sam Lantinga 2017-11-12 22:51:12 -08:00
parent e7cc03e0bd
commit 145d2469ae
60 changed files with 8368 additions and 4310 deletions
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38
src/render/opengl/SDL_render_gl.c
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@ -1349,13 +1349,37 @@ GL_SetupCopy(SDL_Renderer * renderer, SDL_Texture * texture)
GL_SetBlendMode(data, texture->blendMode);
if (texturedata->yuv) {
GL_SetShader(data, SHADER_YUV);
} else if (texturedata->nv12) {
if (texture->format == SDL_PIXELFORMAT_NV12) {
GL_SetShader(data, SHADER_NV12);
} else {
GL_SetShader(data, SHADER_NV21);
if (texturedata->yuv || texturedata->nv12) {
switch (SDL_GetYUVConversionModeForResolution(texture->w, texture->h)) {
case SDL_YUV_CONVERSION_JPEG:
if (texturedata->yuv) {
GL_SetShader(data, SHADER_YUV_JPEG);
} else if (texture->format == SDL_PIXELFORMAT_NV12) {
GL_SetShader(data, SHADER_NV12_JPEG);
} else {
GL_SetShader(data, SHADER_NV21_JPEG);
}
break;
case SDL_YUV_CONVERSION_BT601:
if (texturedata->yuv) {
GL_SetShader(data, SHADER_YUV_BT601);
} else if (texture->format == SDL_PIXELFORMAT_NV12) {
GL_SetShader(data, SHADER_NV12_BT601);
} else {
GL_SetShader(data, SHADER_NV21_BT601);
}
break;
case SDL_YUV_CONVERSION_BT709:
if (texturedata->yuv) {
GL_SetShader(data, SHADER_YUV_BT709);
} else if (texture->format == SDL_PIXELFORMAT_NV12) {
GL_SetShader(data, SHADER_NV12_BT709);
} else {
GL_SetShader(data, SHADER_NV21_BT709);
}
break;
default:
return SDL_SetError("Unsupported YUV conversion mode");
}
} else {
GL_SetShader(data, SHADER_RGB);