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opengl: pixelart fragment shader uses GLSL version 1.30

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This commit is contained in:
Anonymous Maarten
2025-03-16 01:06:03 +01:00
committed by Sam Lantinga
parent 05531c5f4b
commit b9504f247c
1 changed files with 47 additions and 18 deletions
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65
src/render/opengl/SDL_shaders_gl.c
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@@ -237,9 +237,13 @@ struct GL_ShaderContext
* NOTE: Always use sampler2D, etc here. We'll #define them to the
* texture_rectangle versions if we choose to use that extension.
*/
static const char *shader_source[NUM_SHADERS][2] = {
static struct {
const char *vertex_shader;
const char *fragment_shader;
const char *fragment_version;
} shader_source[NUM_SHADERS] = {
// SHADER_NONE
{ NULL, NULL },
{ NULL, NULL, NULL },
// SHADER_SOLID
{
@@ -251,7 +255,9 @@ static const char *shader_source[NUM_SHADERS][2] = {
"void main()\n"
"{\n"
" gl_FragColor = v_color;\n"
"}"
"}",
// fragment version
NULL
},
// SHADER_RGB
@@ -269,7 +275,9 @@ static const char *shader_source[NUM_SHADERS][2] = {
" gl_FragColor = texture2D(tex0, v_texCoord);\n"
" gl_FragColor.a = 1.0;\n"
" gl_FragColor *= v_color;\n"
"}"
"}",
// fragment version
NULL
},
// SHADER_RGBA
@@ -284,7 +292,9 @@ static const char *shader_source[NUM_SHADERS][2] = {
"void main()\n"
"{\n"
" gl_FragColor = texture2D(tex0, v_texCoord) * v_color;\n"
"}"
"}",
// fragment version
NULL
},
// SHADER_RGB_PIXELART
@@ -306,7 +316,9 @@ static const char *shader_source[NUM_SHADERS][2] = {
" gl_FragColor = textureGrad(tex0, uv, dFdx(v_texCoord), dFdy(v_texCoord));\n"
" gl_FragColor.a = 1.0;\n"
" gl_FragColor *= v_color;\n"
"}"
"}",
// fragment version
"#version 130\n"
},
// SHADER_RGBA_PIXELART
@@ -327,7 +339,9 @@ static const char *shader_source[NUM_SHADERS][2] = {
" vec2 uv = (floor(tx) + 0.5 + txOffset) * texel_size.xy;\n"
" gl_FragColor = textureGrad(tex0, uv, dFdx(v_texCoord), dFdy(v_texCoord));\n"
" gl_FragColor *= v_color;\n"
"}"
"}",
// fragment version
"#version 130\n"
},
#ifdef SDL_HAVE_YUV
@@ -337,7 +351,9 @@ static const char *shader_source[NUM_SHADERS][2] = {
TEXTURE_VERTEX_SHADER,
// fragment shader
YUV_SHADER_PROLOGUE
YUV_SHADER_BODY
YUV_SHADER_BODY,
// fragment version
NULL
},
// SHADER_NV12_RA
{
@@ -345,7 +361,9 @@ static const char *shader_source[NUM_SHADERS][2] = {
TEXTURE_VERTEX_SHADER,
// fragment shader
NV12_SHADER_PROLOGUE
NV12_RA_SHADER_BODY
NV12_RA_SHADER_BODY,
// fragment version
NULL
},
// SHADER_NV12_RG
{
@@ -353,7 +371,9 @@ static const char *shader_source[NUM_SHADERS][2] = {
TEXTURE_VERTEX_SHADER,
// fragment shader
NV12_SHADER_PROLOGUE
NV12_RG_SHADER_BODY
NV12_RG_SHADER_BODY,
// fragment version
NULL
},
// SHADER_NV21_RA
{
@@ -361,7 +381,9 @@ static const char *shader_source[NUM_SHADERS][2] = {
TEXTURE_VERTEX_SHADER,
// fragment shader
NV12_SHADER_PROLOGUE
NV21_RA_SHADER_BODY
NV21_RA_SHADER_BODY,
// fragment version
NULL
},
// SHADER_NV21_RG
{
@@ -369,20 +391,23 @@ static const char *shader_source[NUM_SHADERS][2] = {
TEXTURE_VERTEX_SHADER,
// fragment shader
NV12_SHADER_PROLOGUE
NV21_RG_SHADER_BODY
NV21_RG_SHADER_BODY,
// fragment version
NULL
},
#endif // SDL_HAVE_YUV
};
/* *INDENT-ON* */ // clang-format on
static bool CompileShader(GL_ShaderContext *ctx, GLhandleARB shader, const char *defines, const char *source)
static bool CompileShader(GL_ShaderContext *ctx, GLhandleARB shader, const char *version, const char *defines, const char *source)
{
GLint status;
const char *sources[2];
const char *sources[3];
sources[0] = defines;
sources[1] = source;
sources[0] = version;
sources[1] = defines;
sources[2] = source;
ctx->glShaderSourceARB(shader, SDL_arraysize(sources), sources, NULL);
ctx->glCompileShaderARB(shader);
@@ -413,6 +438,7 @@ static bool CompileShaderProgram(GL_ShaderContext *ctx, int index, GL_ShaderData
const int num_tmus_bound = 4;
const char *vert_defines = "";
const char *frag_defines = "";
const char *frag_version = "";
int i;
GLint location;
@@ -432,19 +458,22 @@ static bool CompileShaderProgram(GL_ShaderContext *ctx, int index, GL_ShaderData
frag_defines =
"#define UVCoordScale 1.0\n";
}
if (shader_source[index].fragment_version) {
frag_version = shader_source[index].fragment_version;
}
// Create one program object to rule them all
data->program = ctx->glCreateProgramObjectARB();
// Create the vertex shader
data->vert_shader = ctx->glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB);
if (!CompileShader(ctx, data->vert_shader, vert_defines, shader_source[index][0])) {
if (!CompileShader(ctx, data->vert_shader, "", vert_defines, shader_source[index].vertex_shader)) {
return false;
}
// Create the fragment shader
data->frag_shader = ctx->glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB);
if (!CompileShader(ctx, data->frag_shader, frag_defines, shader_source[index][1])) {
if (!CompileShader(ctx, data->frag_shader, frag_version, frag_defines, shader_source[index].fragment_shader)) {
return false;
}