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Fix GetSampler() bug for INDEX8 pixel format (#15099)

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(cherry picked from commit 4a4ae4a79d)
This commit is contained in:
Void Star Caster
2026-02-24 17:05:30 +01:00
committed by Sam Lantinga
parent 27439467ce
commit 01d8bb5b7c
5 changed files with 34 additions and 38 deletions
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15
src/render/vulkan/SDL_render_vulkan.c
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@@ -3874,6 +3874,11 @@ static bool VULKAN_SetDrawState(SDL_Renderer *renderer, const SDL_RenderCommand
static VkSampler VULKAN_GetSampler(VULKAN_RenderData *data, SDL_PixelFormat format, SDL_ScaleMode scale_mode, SDL_TextureAddressMode address_u, SDL_TextureAddressMode address_v)
{
if (format == SDL_PIXELFORMAT_INDEX8) {
// We'll do linear sampling in the shader if needed
scale_mode = SDL_SCALEMODE_NEAREST;
}
Uint32 key = RENDER_SAMPLER_HASHKEY(scale_mode, address_u, address_v);
SDL_assert(key < SDL_arraysize(data->samplers));
if (!data->samplers[key]) {
@@ -3893,14 +3898,8 @@ static VkSampler VULKAN_GetSampler(VULKAN_RenderData *data, SDL_PixelFormat form
break;
case SDL_SCALEMODE_PIXELART: // Uses linear sampling
case SDL_SCALEMODE_LINEAR:
if (format == SDL_PIXELFORMAT_INDEX8) {
// We'll do linear sampling in the shader
samplerCreateInfo.magFilter = VK_FILTER_NEAREST;
samplerCreateInfo.minFilter = VK_FILTER_NEAREST;
} else {
samplerCreateInfo.magFilter = VK_FILTER_LINEAR;
samplerCreateInfo.minFilter = VK_FILTER_LINEAR;
}
samplerCreateInfo.magFilter = VK_FILTER_LINEAR;
samplerCreateInfo.minFilter = VK_FILTER_LINEAR;
break;
default:
SDL_SetError("Unknown scale mode: %d", scale_mode);