From b12a88af76399ab15a423aa87b387005b8f3082c Mon Sep 17 00:00:00 2001
From: Ethan Lee <[EMAIL REDACTED]>
Date: Mon, 5 Jan 2026 09:48:34 -0500
Subject: [PATCH] render: Add support for private-platform shaders in GPU
backend
---
src/render/gpu/SDL_shaders_gpu.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/src/render/gpu/SDL_shaders_gpu.c b/src/render/gpu/SDL_shaders_gpu.c
index 8870e6072b2d7..e4ade83a05d62 100644
--- a/src/render/gpu/SDL_shaders_gpu.c
+++ b/src/render/gpu/SDL_shaders_gpu.c
@@ -33,6 +33,15 @@ typedef struct GPU_ShaderModuleSource
SDL_GPUShaderFormat format;
} GPU_ShaderModuleSource;
+#if defined(SDL_GPU_PRIVATE)
+#define IF_PRIVATE(...) __VA_ARGS__
+#define HAVE_PRIVATE_SHADERS 1
+#include "SDL_render_private_shaders.h"
+#else
+#define IF_PRIVATE(...)
+#define HAVE_PRIVATE_SHADERS 0
+#endif
+
#if defined(SDL_GPU_VULKAN) && SDL_GPU_VULKAN
#define IF_VULKAN(...) __VA_ARGS__
#define HAVE_SPIRV_SHADERS 1
@@ -62,6 +71,7 @@ typedef struct GPU_ShaderModuleSource
typedef struct GPU_ShaderSources
{
+ IF_PRIVATE(GPU_ShaderModuleSource private;)
IF_VULKAN(GPU_ShaderModuleSource spirv;)
IF_D3D12(GPU_ShaderModuleSource dxil60;)
IF_METAL(GPU_ShaderModuleSource msl;)
@@ -69,6 +79,9 @@ typedef struct GPU_ShaderSources
unsigned int num_uniform_buffers;
} GPU_ShaderSources;
+#define SHADER_PRIVATE(code) \
+ IF_PRIVATE(.private = { code, sizeof(code), SDL_GPU_SHADERFORMAT_PRIVATE }, )
+
#define SHADER_SPIRV(code) \
IF_VULKAN(.spirv = { code, sizeof(code), SDL_GPU_SHADERFORMAT_SPIRV }, )
@@ -83,6 +96,7 @@ static const GPU_ShaderSources vert_shader_sources[NUM_VERT_SHADERS] = {
[VERT_SHADER_LINEPOINT] = {
.num_samplers = 0,
.num_uniform_buffers = 1,
+ SHADER_PRIVATE(linepoint_vert_private)
SHADER_SPIRV(linepoint_vert_spv)
SHADER_DXIL60(linepoint_vert_dxil)
SHADER_METAL(linepoint_vert_msl)
@@ -90,6 +104,7 @@ static const GPU_ShaderSources vert_shader_sources[NUM_VERT_SHADERS] = {
[VERT_SHADER_TRI_COLOR] = {
.num_samplers = 0,
.num_uniform_buffers = 1,
+ SHADER_PRIVATE(tri_color_vert_private)
SHADER_SPIRV(tri_color_vert_spv)
SHADER_DXIL60(tri_color_vert_dxil)
SHADER_METAL(tri_color_vert_msl)
@@ -97,6 +112,7 @@ static const GPU_ShaderSources vert_shader_sources[NUM_VERT_SHADERS] = {
[VERT_SHADER_TRI_TEXTURE] = {
.num_samplers = 0,
.num_uniform_buffers = 1,
+ SHADER_PRIVATE(tri_texture_vert_private)
SHADER_SPIRV(tri_texture_vert_spv)
SHADER_DXIL60(tri_texture_vert_dxil)
SHADER_METAL(tri_texture_vert_msl)
@@ -107,6 +123,7 @@ static const GPU_ShaderSources frag_shader_sources[NUM_FRAG_SHADERS] = {
[FRAG_SHADER_COLOR] = {
.num_samplers = 0,
.num_uniform_buffers = 1,
+ SHADER_PRIVATE(color_frag_private)
SHADER_SPIRV(color_frag_spv)
SHADER_DXIL60(color_frag_dxil)
SHADER_METAL(color_frag_msl)
@@ -114,6 +131,7 @@ static const GPU_ShaderSources frag_shader_sources[NUM_FRAG_SHADERS] = {
[FRAG_SHADER_TEXTURE_RGB] = {
.num_samplers = 1,
.num_uniform_buffers = 1,
+ SHADER_PRIVATE(texture_rgb_frag_private)
SHADER_SPIRV(texture_rgb_frag_spv)
SHADER_DXIL60(texture_rgb_frag_dxil)
SHADER_METAL(texture_rgb_frag_msl)
@@ -121,6 +139,7 @@ static const GPU_ShaderSources frag_shader_sources[NUM_FRAG_SHADERS] = {
[FRAG_SHADER_TEXTURE_RGBA] = {
.num_samplers = 1,
.num_uniform_buffers = 1,
+ SHADER_PRIVATE(texture_rgba_frag_private)
SHADER_SPIRV(texture_rgba_frag_spv)
SHADER_DXIL60(texture_rgba_frag_dxil)
SHADER_METAL(texture_rgba_frag_msl)
@@ -128,6 +147,7 @@ static const GPU_ShaderSources frag_shader_sources[NUM_FRAG_SHADERS] = {
[FRAG_SHADER_TEXTURE_ADVANCED] = {
.num_samplers = 3,
.num_uniform_buffers = 1,
+ SHADER_PRIVATE(texture_advanced_frag_private)
SHADER_SPIRV(texture_advanced_frag_spv)
SHADER_DXIL60(texture_advanced_frag_dxil)
SHADER_METAL(texture_advanced_frag_msl)
@@ -143,6 +163,10 @@ static SDL_GPUShader *CompileShader(const GPU_ShaderSources *sources, SDL_GPUDev
if (formats == SDL_GPU_SHADERFORMAT_INVALID) {
// SDL_GetGPUShaderFormats already set the error
return NULL;
+#if HAVE_PRIVATE_SHADERS
+ } else if (formats & SDL_GPU_SHADERFORMAT_PRIVATE) {
+ sms = &sources->private;
+#endif // HAVE_PRIVATE_SHADERS
#if HAVE_SPIRV_SHADERS
} else if (formats & SDL_GPU_SHADERFORMAT_SPIRV) {
sms = &sources->spirv;
@@ -251,6 +275,7 @@ void GPU_FillSupportedShaderFormats(SDL_PropertiesID props)
custom_shaders = true;
}
if (!custom_shaders) {
+ SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_PRIVATE_BOOLEAN, HAVE_PRIVATE_SHADERS);
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_SPIRV_BOOLEAN, HAVE_SPIRV_SHADERS);
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_DXIL_BOOLEAN, HAVE_DXIL60_SHADERS);
SDL_SetBooleanProperty(props, SDL_PROP_GPU_DEVICE_CREATE_SHADERS_MSL_BOOLEAN, HAVE_METAL_SHADERS);