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Finalized the SDL render API colorspaces

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The renderer will always use the sRGB colorspace for drawing, and will default to the sRGB output colorspace. If you want blending in linear space and HDR support, you can select the scRGB output colorspace, which is supported by the direct3d11 and direct3d12
This commit is contained in:
Sam Lantinga
2024-02-02 12:09:37 -08:00
parent 7c089f4e57
commit 9591b2cfb4
12 changed files with 195 additions and 248 deletions
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24
src/render/opengl/SDL_render_gl.c
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@@ -401,27 +401,18 @@ static SDL_bool GL_SupportsBlendMode(SDL_Renderer *renderer, SDL_BlendMode blend
return SDL_TRUE;
}
static SDL_bool convert_format(Uint32 pixel_format, Uint32 colorspace, SDL_bool colorspace_conversion,
GLint *internalFormat, GLenum *format, GLenum *type)
static SDL_bool convert_format(Uint32 pixel_format, GLint *internalFormat, GLenum *format, GLenum *type)
{
switch (pixel_format) {
case SDL_PIXELFORMAT_ARGB8888:
case SDL_PIXELFORMAT_XRGB8888:
if (colorspace_conversion && colorspace == SDL_COLORSPACE_SRGB) {
*internalFormat = GL_SRGB8_ALPHA8;
} else {
*internalFormat = GL_RGBA8;
}
*internalFormat = GL_RGBA8;
*format = GL_BGRA;
*type = GL_UNSIGNED_INT_8_8_8_8_REV;
break;
case SDL_PIXELFORMAT_ABGR8888:
case SDL_PIXELFORMAT_XBGR8888:
if (colorspace_conversion && colorspace == SDL_COLORSPACE_SRGB) {
*internalFormat = GL_SRGB8_ALPHA8;
} else {
*internalFormat = GL_RGBA8;
}
*internalFormat = GL_RGBA8;
*format = GL_RGBA;
*type = GL_UNSIGNED_INT_8_8_8_8_REV;
break;
@@ -466,8 +457,7 @@ static int GL_CreateTexture(SDL_Renderer *renderer, SDL_Texture *texture, SDL_Pr
return SDL_SetError("Render targets not supported by OpenGL");
}
if (!convert_format(texture->format, texture->colorspace, renderer->colorspace_conversion,
&internalFormat, &format, &type)) {
if (!convert_format(texture->format, &internalFormat, &format, &type)) {
return SDL_SetError("Texture format %s not supported by OpenGL",
SDL_GetPixelFormatName(texture->format));
}
@@ -1481,8 +1471,7 @@ static int GL_RenderReadPixels(SDL_Renderer *renderer, const SDL_Rect *rect,
GL_ActivateRenderer(renderer);
if (!convert_format(temp_format, renderer->input_colorspace, renderer->colorspace_conversion,
&internalFormat, &format, &type)) {
if (!convert_format(temp_format, &internalFormat, &format, &type)) {
return SDL_SetError("Texture format %s not supported by OpenGL",
SDL_GetPixelFormatName(temp_format));
}
@@ -1925,9 +1914,6 @@ static SDL_Renderer *GL_CreateRenderer(SDL_Window *window, SDL_PropertiesID crea
data->glDisable(data->textype);
data->glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
data->glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
if (renderer->colorspace_conversion && renderer->output_colorspace == SDL_COLORSPACE_SRGB) {
data->glEnable(GL_FRAMEBUFFER_SRGB);
}
/* This ended up causing video discrepancies between OpenGL and Direct3D */
/* data->glEnable(GL_LINE_SMOOTH); */