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Diffstat (limited to '3rdparty/SDL2/src/render/opengl/SDL_shaders_gl.c')
-rw-r--r--3rdparty/SDL2/src/render/opengl/SDL_shaders_gl.c463
1 files changed, 0 insertions, 463 deletions
diff --git a/3rdparty/SDL2/src/render/opengl/SDL_shaders_gl.c b/3rdparty/SDL2/src/render/opengl/SDL_shaders_gl.c
deleted file mode 100644
index bcf7b431503..00000000000
--- a/3rdparty/SDL2/src/render/opengl/SDL_shaders_gl.c
+++ /dev/null
@@ -1,463 +0,0 @@
-/*
- Simple DirectMedia Layer
- Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
-
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
-
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
-
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- 2. Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- 3. This notice may not be removed or altered from any source distribution.
-*/
-#include "../../SDL_internal.h"
-
-#if SDL_VIDEO_RENDER_OGL && !SDL_RENDER_DISABLED
-
-#include "SDL_stdinc.h"
-#include "SDL_log.h"
-#include "SDL_opengl.h"
-#include "SDL_video.h"
-#include "SDL_shaders_gl.h"
-
-/* OpenGL shader implementation */
-
-/* #define DEBUG_SHADERS */
-
-typedef struct
-{
- GLhandleARB program;
- GLhandleARB vert_shader;
- GLhandleARB frag_shader;
-} GL_ShaderData;
-
-struct GL_ShaderContext
-{
- GLenum (*glGetError)(void);
-
- PFNGLATTACHOBJECTARBPROC glAttachObjectARB;
- PFNGLCOMPILESHADERARBPROC glCompileShaderARB;
- PFNGLCREATEPROGRAMOBJECTARBPROC glCreateProgramObjectARB;
- PFNGLCREATESHADEROBJECTARBPROC glCreateShaderObjectARB;
- PFNGLDELETEOBJECTARBPROC glDeleteObjectARB;
- PFNGLGETINFOLOGARBPROC glGetInfoLogARB;
- PFNGLGETOBJECTPARAMETERIVARBPROC glGetObjectParameterivARB;
- PFNGLGETUNIFORMLOCATIONARBPROC glGetUniformLocationARB;
- PFNGLLINKPROGRAMARBPROC glLinkProgramARB;
- PFNGLSHADERSOURCEARBPROC glShaderSourceARB;
- PFNGLUNIFORM1IARBPROC glUniform1iARB;
- PFNGLUNIFORM1FARBPROC glUniform1fARB;
- PFNGLUSEPROGRAMOBJECTARBPROC glUseProgramObjectARB;
-
- SDL_bool GL_ARB_texture_rectangle_supported;
-
- GL_ShaderData shaders[NUM_SHADERS];
-};
-
-/*
- * 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] =
-{
- /* SHADER_NONE */
- { NULL, NULL },
-
- /* SHADER_SOLID */
- {
- /* vertex shader */
-"varying vec4 v_color;\n"
-"\n"
-"void main()\n"
-"{\n"
-" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
-" v_color = gl_Color;\n"
-"}",
- /* fragment shader */
-"varying vec4 v_color;\n"
-"\n"
-"void main()\n"
-"{\n"
-" gl_FragColor = v_color;\n"
-"}"
- },
-
- /* SHADER_RGB */
- {
- /* vertex shader */
-"varying vec4 v_color;\n"
-"varying vec2 v_texCoord;\n"
-"\n"
-"void main()\n"
-"{\n"
-" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
-" v_color = gl_Color;\n"
-" v_texCoord = vec2(gl_MultiTexCoord0);\n"
-"}",
- /* fragment shader */
-"varying vec4 v_color;\n"
-"varying vec2 v_texCoord;\n"
-"uniform sampler2D tex0;\n"
-"\n"
-"void main()\n"
-"{\n"
-" gl_FragColor = texture2D(tex0, v_texCoord) * v_color;\n"
-"}"
- },
-
- /* SHADER_YUV */
- {
- /* vertex shader */
-"varying vec4 v_color;\n"
-"varying vec2 v_texCoord;\n"
-"\n"
-"void main()\n"
-"{\n"
-" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
-" v_color = gl_Color;\n"
-" v_texCoord = vec2(gl_MultiTexCoord0);\n"
-"}",
- /* fragment shader */
-"varying vec4 v_color;\n"
-"varying vec2 v_texCoord;\n"
-"uniform sampler2D tex0; // Y \n"
-"uniform sampler2D tex1; // U \n"
-"uniform sampler2D tex2; // V \n"
-"\n"
-"// YUV offset \n"
-"const vec3 offset = vec3(-0.0627451017, -0.501960814, -0.501960814);\n"
-"\n"
-"// RGB coefficients \n"
-"const vec3 Rcoeff = vec3(1.164, 0.000, 1.596);\n"
-"const vec3 Gcoeff = vec3(1.164, -0.391, -0.813);\n"
-"const vec3 Bcoeff = vec3(1.164, 2.018, 0.000);\n"
-"\n"
-"void main()\n"
-"{\n"
-" vec2 tcoord;\n"
-" vec3 yuv, rgb;\n"
-"\n"
-" // Get the Y value \n"
-" tcoord = v_texCoord;\n"
-" yuv.x = texture2D(tex0, tcoord).r;\n"
-"\n"
-" // Get the U and V values \n"
-" tcoord *= UVCoordScale;\n"
-" yuv.y = texture2D(tex1, tcoord).r;\n"
-" yuv.z = texture2D(tex2, tcoord).r;\n"
-"\n"
-" // Do the color transform \n"
-" yuv += offset;\n"
-" rgb.r = dot(yuv, Rcoeff);\n"
-" rgb.g = dot(yuv, Gcoeff);\n"
-" rgb.b = dot(yuv, Bcoeff);\n"
-"\n"
-" // That was easy. :) \n"
-" gl_FragColor = vec4(rgb, 1.0) * v_color;\n"
-"}"
- },
-
- /* SHADER_NV12 */
- {
- /* vertex shader */
-"varying vec4 v_color;\n"
-"varying vec2 v_texCoord;\n"
-"\n"
-"void main()\n"
-"{\n"
-" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
-" v_color = gl_Color;\n"
-" v_texCoord = vec2(gl_MultiTexCoord0);\n"
-"}",
- /* fragment shader */
-"varying vec4 v_color;\n"
-"varying vec2 v_texCoord;\n"
-"uniform sampler2D tex0; // Y \n"
-"uniform sampler2D tex1; // U/V \n"
-"\n"
-"// YUV offset \n"
-"const vec3 offset = vec3(-0.0627451017, -0.501960814, -0.501960814);\n"
-"\n"
-"// RGB coefficients \n"
-"const vec3 Rcoeff = vec3(1.164, 0.000, 1.596);\n"
-"const vec3 Gcoeff = vec3(1.164, -0.391, -0.813);\n"
-"const vec3 Bcoeff = vec3(1.164, 2.018, 0.000);\n"
-"\n"
-"void main()\n"
-"{\n"
-" vec2 tcoord;\n"
-" vec3 yuv, rgb;\n"
-"\n"
-" // Get the Y value \n"
-" tcoord = v_texCoord;\n"
-" yuv.x = texture2D(tex0, tcoord).r;\n"
-"\n"
-" // Get the U and V values \n"
-" tcoord *= UVCoordScale;\n"
-" yuv.yz = texture2D(tex1, tcoord).ra;\n"
-"\n"
-" // Do the color transform \n"
-" yuv += offset;\n"
-" rgb.r = dot(yuv, Rcoeff);\n"
-" rgb.g = dot(yuv, Gcoeff);\n"
-" rgb.b = dot(yuv, Bcoeff);\n"
-"\n"
-" // That was easy. :) \n"
-" gl_FragColor = vec4(rgb, 1.0) * v_color;\n"
-"}"
- },
-
- /* SHADER_NV21 */
- {
- /* vertex shader */
-"varying vec4 v_color;\n"
-"varying vec2 v_texCoord;\n"
-"\n"
-"void main()\n"
-"{\n"
-" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
-" v_color = gl_Color;\n"
-" v_texCoord = vec2(gl_MultiTexCoord0);\n"
-"}",
- /* fragment shader */
-"varying vec4 v_color;\n"
-"varying vec2 v_texCoord;\n"
-"uniform sampler2D tex0; // Y \n"
-"uniform sampler2D tex1; // U/V \n"
-"\n"
-"// YUV offset \n"
-"const vec3 offset = vec3(-0.0627451017, -0.501960814, -0.501960814);\n"
-"\n"
-"// RGB coefficients \n"
-"const vec3 Rcoeff = vec3(1.164, 0.000, 1.596);\n"
-"const vec3 Gcoeff = vec3(1.164, -0.391, -0.813);\n"
-"const vec3 Bcoeff = vec3(1.164, 2.018, 0.000);\n"
-"\n"
-"void main()\n"
-"{\n"
-" vec2 tcoord;\n"
-" vec3 yuv, rgb;\n"
-"\n"
-" // Get the Y value \n"
-" tcoord = v_texCoord;\n"
-" yuv.x = texture2D(tex0, tcoord).r;\n"
-"\n"
-" // Get the U and V values \n"
-" tcoord *= UVCoordScale;\n"
-" yuv.yz = texture2D(tex1, tcoord).ar;\n"
-"\n"
-" // Do the color transform \n"
-" yuv += offset;\n"
-" rgb.r = dot(yuv, Rcoeff);\n"
-" rgb.g = dot(yuv, Gcoeff);\n"
-" rgb.b = dot(yuv, Bcoeff);\n"
-"\n"
-" // That was easy. :) \n"
-" gl_FragColor = vec4(rgb, 1.0) * v_color;\n"
-"}"
- },
-};
-
-static SDL_bool
-CompileShader(GL_ShaderContext *ctx, GLhandleARB shader, const char *defines, const char *source)
-{
- GLint status;
- const char *sources[2];
-
- sources[0] = defines;
- sources[1] = source;
-
- ctx->glShaderSourceARB(shader, SDL_arraysize(sources), sources, NULL);
- ctx->glCompileShaderARB(shader);
- ctx->glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &status);
- if (status == 0) {
- GLint length;
- char *info;
-
- ctx->glGetObjectParameterivARB(shader, GL_OBJECT_INFO_LOG_LENGTH_ARB, &length);
- info = SDL_stack_alloc(char, length+1);
- ctx->glGetInfoLogARB(shader, length, NULL, info);
- SDL_LogError(SDL_LOG_CATEGORY_RENDER,
- "Failed to compile shader:\n%s%s\n%s", defines, source, info);
-#ifdef DEBUG_SHADERS
- fprintf(stderr,
- "Failed to compile shader:\n%s%s\n%s", defines, source, info);
-#endif
- SDL_stack_free(info);
-
- return SDL_FALSE;
- } else {
- return SDL_TRUE;
- }
-}
-
-static SDL_bool
-CompileShaderProgram(GL_ShaderContext *ctx, int index, GL_ShaderData *data)
-{
- const int num_tmus_bound = 4;
- const char *vert_defines = "";
- const char *frag_defines = "";
- int i;
- GLint location;
-
- if (index == SHADER_NONE) {
- return SDL_TRUE;
- }
-
- ctx->glGetError();
-
- /* Make sure we use the correct sampler type for our texture type */
- if (ctx->GL_ARB_texture_rectangle_supported) {
- frag_defines =
-"#define sampler2D sampler2DRect\n"
-"#define texture2D texture2DRect\n"
-"#define UVCoordScale 0.5\n";
- } else {
- frag_defines =
-"#define UVCoordScale 1.0\n";
- }
-
- /* 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])) {
- return SDL_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])) {
- return SDL_FALSE;
- }
-
- /* ... and in the darkness bind them */
- ctx->glAttachObjectARB(data->program, data->vert_shader);
- ctx->glAttachObjectARB(data->program, data->frag_shader);
- ctx->glLinkProgramARB(data->program);
-
- /* Set up some uniform variables */
- ctx->glUseProgramObjectARB(data->program);
- for (i = 0; i < num_tmus_bound; ++i) {
- char tex_name[10];
- SDL_snprintf(tex_name, SDL_arraysize(tex_name), "tex%d", i);
- location = ctx->glGetUniformLocationARB(data->program, tex_name);
- if (location >= 0) {
- ctx->glUniform1iARB(location, i);
- }
- }
- ctx->glUseProgramObjectARB(0);
-
- return (ctx->glGetError() == GL_NO_ERROR);
-}
-
-static void
-DestroyShaderProgram(GL_ShaderContext *ctx, GL_ShaderData *data)
-{
- ctx->glDeleteObjectARB(data->vert_shader);
- ctx->glDeleteObjectARB(data->frag_shader);
- ctx->glDeleteObjectARB(data->program);
-}
-
-GL_ShaderContext *
-GL_CreateShaderContext()
-{
- GL_ShaderContext *ctx;
- SDL_bool shaders_supported;
- int i;
-
- ctx = (GL_ShaderContext *)SDL_calloc(1, sizeof(*ctx));
- if (!ctx) {
- return NULL;
- }
-
- if (!SDL_GL_ExtensionSupported("GL_ARB_texture_non_power_of_two") &&
- (SDL_GL_ExtensionSupported("GL_ARB_texture_rectangle") ||
- SDL_GL_ExtensionSupported("GL_EXT_texture_rectangle"))) {
- ctx->GL_ARB_texture_rectangle_supported = SDL_TRUE;
- }
-
- /* Check for shader support */
- shaders_supported = SDL_FALSE;
- if (SDL_GL_ExtensionSupported("GL_ARB_shader_objects") &&
- SDL_GL_ExtensionSupported("GL_ARB_shading_language_100") &&
- SDL_GL_ExtensionSupported("GL_ARB_vertex_shader") &&
- SDL_GL_ExtensionSupported("GL_ARB_fragment_shader")) {
- ctx->glGetError = (GLenum (*)(void)) SDL_GL_GetProcAddress("glGetError");
- ctx->glAttachObjectARB = (PFNGLATTACHOBJECTARBPROC) SDL_GL_GetProcAddress("glAttachObjectARB");
- ctx->glCompileShaderARB = (PFNGLCOMPILESHADERARBPROC) SDL_GL_GetProcAddress("glCompileShaderARB");
- ctx->glCreateProgramObjectARB = (PFNGLCREATEPROGRAMOBJECTARBPROC) SDL_GL_GetProcAddress("glCreateProgramObjectARB");
- ctx->glCreateShaderObjectARB = (PFNGLCREATESHADEROBJECTARBPROC) SDL_GL_GetProcAddress("glCreateShaderObjectARB");
- ctx->glDeleteObjectARB = (PFNGLDELETEOBJECTARBPROC) SDL_GL_GetProcAddress("glDeleteObjectARB");
- ctx->glGetInfoLogARB = (PFNGLGETINFOLOGARBPROC) SDL_GL_GetProcAddress("glGetInfoLogARB");
- ctx->glGetObjectParameterivARB = (PFNGLGETOBJECTPARAMETERIVARBPROC) SDL_GL_GetProcAddress("glGetObjectParameterivARB");
- ctx->glGetUniformLocationARB = (PFNGLGETUNIFORMLOCATIONARBPROC) SDL_GL_GetProcAddress("glGetUniformLocationARB");
- ctx->glLinkProgramARB = (PFNGLLINKPROGRAMARBPROC) SDL_GL_GetProcAddress("glLinkProgramARB");
- ctx->glShaderSourceARB = (PFNGLSHADERSOURCEARBPROC) SDL_GL_GetProcAddress("glShaderSourceARB");
- ctx->glUniform1iARB = (PFNGLUNIFORM1IARBPROC) SDL_GL_GetProcAddress("glUniform1iARB");
- ctx->glUniform1fARB = (PFNGLUNIFORM1FARBPROC) SDL_GL_GetProcAddress("glUniform1fARB");
- ctx->glUseProgramObjectARB = (PFNGLUSEPROGRAMOBJECTARBPROC) SDL_GL_GetProcAddress("glUseProgramObjectARB");
- if (ctx->glGetError &&
- ctx->glAttachObjectARB &&
- ctx->glCompileShaderARB &&
- ctx->glCreateProgramObjectARB &&
- ctx->glCreateShaderObjectARB &&
- ctx->glDeleteObjectARB &&
- ctx->glGetInfoLogARB &&
- ctx->glGetObjectParameterivARB &&
- ctx->glGetUniformLocationARB &&
- ctx->glLinkProgramARB &&
- ctx->glShaderSourceARB &&
- ctx->glUniform1iARB &&
- ctx->glUniform1fARB &&
- ctx->glUseProgramObjectARB) {
- shaders_supported = SDL_TRUE;
- }
- }
-
- if (!shaders_supported) {
- SDL_free(ctx);
- return NULL;
- }
-
- /* Compile all the shaders */
- for (i = 0; i < NUM_SHADERS; ++i) {
- if (!CompileShaderProgram(ctx, i, &ctx->shaders[i])) {
- GL_DestroyShaderContext(ctx);
- return NULL;
- }
- }
-
- /* We're done! */
- return ctx;
-}
-
-void
-GL_SelectShader(GL_ShaderContext *ctx, GL_Shader shader)
-{
- ctx->glUseProgramObjectARB(ctx->shaders[shader].program);
-}
-
-void
-GL_DestroyShaderContext(GL_ShaderContext *ctx)
-{
- int i;
-
- for (i = 0; i < NUM_SHADERS; ++i) {
- DestroyShaderProgram(ctx, &ctx->shaders[i]);
- }
- SDL_free(ctx);
-}
-
-#endif /* SDL_VIDEO_RENDER_OGL && !SDL_RENDER_DISABLED */
-
-/* vi: set ts=4 sw=4 expandtab: */