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mojoshader_opengl.c
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/**
* MojoShader; generate shader programs from bytecode of compiled
* Direct3D shaders.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
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// !!! FIXME: most of these _MSC_VER should probably be _WINDOWS?
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#ifdef _MSC_VER
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h> // GL headers need this for WINGDIAPI definition.
#endif
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#if (defined(__APPLE__) && defined(__MACH__))
#define PLATFORM_MACOSX 1
#endif
#if PLATFORM_MACOSX
#include <Carbon/Carbon.h>
#endif
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#define __MOJOSHADER_INTERNAL__ 1
#include "mojoshader_internal.h"
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#define GL_GLEXT_LEGACY 1
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#include "GL/gl.h"
#include "GL/glext.h"
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#ifndef GL_HALF_FLOAT
#define GL_HALF_FLOAT 0x140B
#endif
#ifndef GL_HALF_FLOAT_OES
#define GL_HALF_FLOAT_OES 0x8D61
#endif
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struct MOJOSHADER_glShader
{
const MOJOSHADER_parseData *parseData;
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GLuint handle;
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uint32 refcount;
};
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typedef struct
{
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MOJOSHADER_shaderType shader_type;
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const MOJOSHADER_uniform *uniform;
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GLint location;
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} UniformMap;
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typedef struct
{
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const MOJOSHADER_attribute *attribute;
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GLint location;
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} AttributeMap;
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struct MOJOSHADER_glProgram
{
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MOJOSHADER_glShader *vertex;
MOJOSHADER_glShader *fragment;
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GLuint handle;
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uint32 generation;
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uint32 uniform_count;
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UniformMap *uniforms;
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uint32 attribute_count;
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AttributeMap *attributes;
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size_t vs_uniforms_float4_count;
GLfloat *vs_uniforms_float4;
size_t vs_uniforms_int4_count;
GLint *vs_uniforms_int4;
size_t vs_uniforms_bool_count;
GLint *vs_uniforms_bool;
size_t ps_uniforms_float4_count;
GLfloat *ps_uniforms_float4;
size_t ps_uniforms_int4_count;
GLint *ps_uniforms_int4;
size_t ps_uniforms_bool_count;
GLint *ps_uniforms_bool;
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uint32 refcount;
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// GLSL uses these...location of uniform arrays.
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GLint vs_float4_loc;
GLint vs_int4_loc;
GLint vs_bool_loc;
GLint ps_float4_loc;
GLint ps_int4_loc;
GLint ps_bool_loc;
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};
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#ifndef WINGDIAPI
#define WINGDIAPI
#endif
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// Entry points in base OpenGL that lack function pointer prototypes...
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typedef WINGDIAPI void (APIENTRYP PFNGLGETINTEGERVPROC) (GLenum pname, GLint *params);
typedef WINGDIAPI const GLubyte * (APIENTRYP PFNGLGETSTRINGPROC) (GLenum name);
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typedef WINGDIAPI GLenum (APIENTRYP PFNGLGETERRORPROC) (void);
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typedef WINGDIAPI void (APIENTRYP PFNGLENABLEPROC) (GLenum cap);
typedef WINGDIAPI void (APIENTRYP PFNGLDISABLEPROC) (GLenum cap);
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// Max entries for each register file type...
#define MAX_REG_FILE_F 8192
#define MAX_REG_FILE_I 2047
#define MAX_REG_FILE_B 2047
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struct MOJOSHADER_glContext
{
// Allocators...
MOJOSHADER_malloc malloc_fn;
MOJOSHADER_free free_fn;
void *malloc_data;
// The constant register files...
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// !!! FIXME: Man, it kills me how much memory this takes...
// !!! FIXME: ... make this dynamically allocated on demand.
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GLfloat vs_reg_file_f[MAX_REG_FILE_F * 4];
GLint vs_reg_file_i[MAX_REG_FILE_I * 4];
uint8 vs_reg_file_b[MAX_REG_FILE_B];
GLfloat ps_reg_file_f[MAX_REG_FILE_F * 4];
GLint ps_reg_file_i[MAX_REG_FILE_I * 4];
uint8 ps_reg_file_b[MAX_REG_FILE_B];
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GLuint sampler_reg_file[16];
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// This increments every time we change the register files.
uint32 generation;
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// This tells us which vertex attribute arrays we have enabled.
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GLint max_attrs;
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uint8 want_attr[32];
uint8 have_attr[32];
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// GL stuff...
int opengl_major;
int opengl_minor;
MOJOSHADER_glProgram *bound_program;
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char profile[16];
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// Extensions...
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int have_base_opengl;
int have_GL_ARB_vertex_program;
int have_GL_ARB_fragment_program;
int have_GL_NV_vertex_program2_option;
int have_GL_NV_fragment_program2;
int have_GL_NV_vertex_program3;
int have_GL_NV_gpu_program4;
int have_GL_ARB_shader_objects;
int have_GL_ARB_vertex_shader;
int have_GL_ARB_fragment_shader;
int have_GL_ARB_shading_language_100;
int have_GL_NV_half_float;
int have_GL_ARB_half_float_vertex;
int have_GL_OES_vertex_half_float;
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// Entry points...
PFNGLGETSTRINGPROC glGetString;
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PFNGLGETERRORPROC glGetError;
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PFNGLGETINTEGERVPROC glGetIntegerv;
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PFNGLENABLEPROC glEnable;
PFNGLDISABLEPROC glDisable;
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PFNGLDELETEOBJECTARBPROC glDeleteObject;
PFNGLATTACHOBJECTARBPROC glAttachObject;
PFNGLCOMPILESHADERARBPROC glCompileShader;
PFNGLCREATEPROGRAMOBJECTARBPROC glCreateProgramObject;
PFNGLCREATESHADEROBJECTARBPROC glCreateShaderObject;
PFNGLDISABLEVERTEXATTRIBARRAYARBPROC glDisableVertexAttribArray;
PFNGLENABLEVERTEXATTRIBARRAYARBPROC glEnableVertexAttribArray;
PFNGLGETATTRIBLOCATIONARBPROC glGetAttribLocation;
PFNGLGETINFOLOGARBPROC glGetInfoLog;
PFNGLGETOBJECTPARAMETERIVARBPROC glGetObjectParameteriv;
PFNGLGETUNIFORMLOCATIONARBPROC glGetUniformLocation;
PFNGLLINKPROGRAMARBPROC glLinkProgram;
PFNGLSHADERSOURCEARBPROC glShaderSource;
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PFNGLUNIFORM1IARBPROC glUniform1i;
PFNGLUNIFORM1IVARBPROC glUniform1iv;
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PFNGLUNIFORM4FVARBPROC glUniform4fv;
PFNGLUNIFORM4IVARBPROC glUniform4iv;
PFNGLUSEPROGRAMOBJECTARBPROC glUseProgramObject;
PFNGLVERTEXATTRIBPOINTERARBPROC glVertexAttribPointer;
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PFNGLGETPROGRAMIVARBPROC glGetProgramivARB;
PFNGLGETPROGRAMSTRINGARBPROC glGetProgramStringARB;
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PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB;
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PFNGLPROGRAMLOCALPARAMETERI4IVNVPROC glProgramLocalParameterI4ivNV;
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PFNGLDELETEPROGRAMSARBPROC glDeleteProgramsARB;
PFNGLGENPROGRAMSARBPROC glGenProgramsARB;
PFNGLBINDPROGRAMARBPROC glBindProgramARB;
PFNGLPROGRAMSTRINGARBPROC glProgramStringARB;
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// interface for profile-specific things.
int (*profileMaxUniforms)(MOJOSHADER_shaderType shader_type);
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int (*profileCompileShader)(const MOJOSHADER_parseData *pd, GLuint *s);
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void (*profileDeleteShader)(const GLuint shader);
void (*profileDeleteProgram)(const GLuint program);
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GLint (*profileGetAttribLocation)(MOJOSHADER_glProgram *program, int idx);
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GLint (*profileGetUniformLocation)(MOJOSHADER_glProgram *program, MOJOSHADER_glShader *shader, int idx);
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GLint (*profileGetSamplerLocation)(MOJOSHADER_glProgram *, MOJOSHADER_glShader *, int);
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GLuint (*profileLinkProgram)(MOJOSHADER_glShader *, MOJOSHADER_glShader *);
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void (*profileFinalInitProgram)(MOJOSHADER_glProgram *program);
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void (*profileUseProgramObject)(MOJOSHADER_glProgram *program);
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void (*profilePushConstantArray)(MOJOSHADER_glProgram *, const MOJOSHADER_uniform *, const GLfloat *);
void (*profilePushUniforms)(void);
void (*profilePushSampler)(GLint loc, GLuint sampler);
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int (*profileMustPushConstantArrays)(void);
int (*profileMustPushSamplers)(void);
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};
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static MOJOSHADER_glContext *ctx = NULL;
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// Error state...
static char error_buffer[1024] = { '\0' };
static void set_error(const char *str)
{
snprintf(error_buffer, sizeof (error_buffer), "%s", str);
} // set_error
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#if PLATFORM_MACOSX
static inline int macosx_version_atleast(int x, int y, int z)
{
static int checked = 0;
static int combined = 0;
if (!checked)
{
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SInt32 ver, major, minor, patch;
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int convert = 0;
if (Gestalt(gestaltSystemVersion, &ver) != noErr)
ver = 0x1000; // oh well.
else if (ver < 0x1030)
convert = 1; // split (ver) into (major),(minor),(patch).
else
{
// presumably this won't fail. But if it does, we'll just use the
// original version value. This might cut the value--10.12.11 will
// come out to 10.9.9, for example--but it's better than nothing.
if (Gestalt(gestaltSystemVersionMajor, &major) != noErr)
convert = 1;
else if (Gestalt(gestaltSystemVersionMinor, &minor) != noErr)
convert = 1;
else if (Gestalt(gestaltSystemVersionBugFix, &patch) != noErr)
convert = 1;
} // else
if (convert)
{
major = ((ver & 0xFF00) >> 8);
major = (((major / 16) * 10) + (major % 16));
minor = ((ver & 0xF0) >> 4);
patch = (ver & 0xF);
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} // if
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combined = (major << 16) | (minor << 8) | patch;
checked = 1;
} // if
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return (combined >= ((x << 16) | (y << 8) | z));
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} // macosx_version_atleast
#endif
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static inline void *Malloc(const size_t len)
{
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void *retval = ctx->malloc_fn((int) len, ctx->malloc_data);
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if (retval == NULL)
set_error("out of memory");
return retval;
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} // Malloc
static inline void Free(void *ptr)
{
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if (ptr != NULL)
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ctx->free_fn(ptr, ctx->malloc_data);
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} // Free
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static inline void toggle_gl_state(GLenum state, int val)
{
if (val)
ctx->glEnable(state);
else
ctx->glDisable(state);
} // toggle_gl_state
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// profile-specific implementations...
#if SUPPORT_PROFILE_GLSL
static inline GLenum glsl_shader_type(const MOJOSHADER_shaderType t)
{
if (t == MOJOSHADER_TYPE_VERTEX)
return GL_VERTEX_SHADER;
else if (t == MOJOSHADER_TYPE_PIXEL)
return GL_FRAGMENT_SHADER;
// !!! FIXME: geometry shaders?
return GL_NONE;
} // glsl_shader_type
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static int impl_GLSL_MustPushConstantArrays(void) { return 1; }
static int impl_GLSL_MustPushSamplers(void) { return 1; }
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static int impl_GLSL_MaxUniforms(MOJOSHADER_shaderType shader_type)
{
GLenum pname = GL_NONE;
GLint val = 0;
if (shader_type == MOJOSHADER_TYPE_VERTEX)
pname = GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB;
else if (shader_type == MOJOSHADER_TYPE_PIXEL)
pname = GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB;
else
return -1;
ctx->glGetIntegerv(pname, &val);
return (int) val;
} // impl_GLSL_MaxUniforms
static int impl_GLSL_CompileShader(const MOJOSHADER_parseData *pd, GLuint *s)
{
GLint ok = 0;
GLint shaderlen = (GLint) pd->output_len;
const GLenum shader_type = glsl_shader_type(pd->shader_type);
GLuint shader = ctx->glCreateShaderObject(shader_type);
ctx->glShaderSource(shader, 1, (const GLchar **) &pd->output, &shaderlen);
ctx->glCompileShader(shader);
ctx->glGetObjectParameteriv(shader, GL_OBJECT_COMPILE_STATUS_ARB, &ok);
if (!ok)
{
GLsizei len = 0;
ctx->glGetInfoLog(shader, sizeof (error_buffer), &len,
(GLchar *) error_buffer);
*s = 0;
return 0;
} // if
*s = shader;
return 1;
} // impl_GLSL_CompileShader
static void impl_GLSL_DeleteShader(const GLuint shader)
{
ctx->glDeleteObject(shader);
} // impl_GLSL_DeleteShader
static void impl_GLSL_DeleteProgram(const GLuint program)
{
ctx->glDeleteObject(program);
} // impl_GLSL_DeleteProgram
static GLint impl_GLSL_GetUniformLocation(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader, int idx)
{
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return 0; // no-op, we push this as one big-ass array now.
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} // impl_GLSL_GetUniformLocation
static GLint impl_GLSL_GetSamplerLocation(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader, int idx)
{
return ctx->glGetUniformLocation(program->handle,
shader->parseData->samplers[idx].name);
} // impl_GLSL_GetSamplerLocation
static GLint impl_GLSL_GetAttribLocation(MOJOSHADER_glProgram *program, int idx)
{
const MOJOSHADER_parseData *pd = program->vertex->parseData;
const MOJOSHADER_attribute *a = pd->attributes;
return ctx->glGetAttribLocation(program->handle, a[idx].name);
} // impl_GLSL_GetAttribLocation
static GLuint impl_GLSL_LinkProgram(MOJOSHADER_glShader *vshader,
MOJOSHADER_glShader *pshader)
{
const GLuint program = ctx->glCreateProgramObject();
if (vshader != NULL) ctx->glAttachObject(program, vshader->handle);
if (pshader != NULL) ctx->glAttachObject(program, pshader->handle);
ctx->glLinkProgram(program);
GLint ok = 0;
ctx->glGetObjectParameteriv(program, GL_OBJECT_LINK_STATUS_ARB, &ok);
if (!ok)
{
GLsizei len = 0;
ctx->glGetInfoLog(program, sizeof (error_buffer), &len, (GLchar *) error_buffer);
ctx->glDeleteObject(program);
return 0;
} // if
return program;
} // impl_GLSL_LinkProgram
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static void impl_GLSL_FinalInitProgram(MOJOSHADER_glProgram *program)
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{
program->vs_float4_loc =
ctx->glGetUniformLocation(program->handle, "vs_uniforms_vec4");
program->vs_int4_loc =
ctx->glGetUniformLocation(program->handle, "vs_uniforms_ivec4");
program->vs_bool_loc =
ctx->glGetUniformLocation(program->handle, "vs_uniforms_bool");
program->ps_float4_loc =
ctx->glGetUniformLocation(program->handle, "ps_uniforms_vec4");
program->ps_int4_loc =
ctx->glGetUniformLocation(program->handle, "ps_uniforms_ivec4");
program->ps_bool_loc =
ctx->glGetUniformLocation(program->handle, "ps_uniforms_bool");
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} // impl_GLSL_FinalInitProgram
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static void impl_GLSL_UseProgramObject(MOJOSHADER_glProgram *program)
{
ctx->glUseProgramObject((program != NULL) ? program->handle : 0);
} // impl_GLSL_UseProgramObject
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static void impl_GLSL_PushConstantArray(MOJOSHADER_glProgram *program,
const MOJOSHADER_uniform *u,
const GLfloat *f)
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{
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const GLint loc = ctx->glGetUniformLocation(program->handle, u->name);
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if (loc >= 0) // not optimized out?
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ctx->glUniform4fv(loc, u->array_count, f);
} // impl_GLSL_PushConstantArray
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static void impl_GLSL_PushUniforms(void)
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{
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const MOJOSHADER_glProgram *program = ctx->bound_program;
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assert(program->uniform_count > 0); // don't call with nothing to do!
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if (program->vs_float4_loc != -1)
{
ctx->glUniform4fv(program->vs_float4_loc,
program->vs_uniforms_float4_count,
program->vs_uniforms_float4);
} // if
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if (program->vs_int4_loc != -1)
{
ctx->glUniform4iv(program->vs_int4_loc,
program->vs_uniforms_int4_count,
program->vs_uniforms_int4);
} // if
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if (program->vs_bool_loc != -1)
{
ctx->glUniform1iv(program->vs_bool_loc,
program->vs_uniforms_bool_count,
program->vs_uniforms_bool);
} // if
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if (program->ps_float4_loc != -1)
{
ctx->glUniform4fv(program->ps_float4_loc,
program->ps_uniforms_float4_count,
program->ps_uniforms_float4);
} // if
if (program->ps_int4_loc != -1)
{
ctx->glUniform4iv(program->ps_int4_loc,
program->ps_uniforms_int4_count,
program->ps_uniforms_int4);
} // if
if (program->ps_bool_loc != -1)
{
ctx->glUniform1iv(program->ps_bool_loc,
program->ps_uniforms_bool_count,
program->ps_uniforms_bool);
} // if
} // impl_GLSL_PushUniforms
static void impl_GLSL_PushSampler(GLint loc, GLuint sampler)
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{
ctx->glUniform1i(loc, sampler);
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} // impl_GLSL_PushSampler
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#endif // SUPPORT_PROFILE_GLSL
#if SUPPORT_PROFILE_ARB1
static inline GLenum arb1_shader_type(const MOJOSHADER_shaderType t)
{
if (t == MOJOSHADER_TYPE_VERTEX)
return GL_VERTEX_PROGRAM_ARB;
else if (t == MOJOSHADER_TYPE_PIXEL)
return GL_FRAGMENT_PROGRAM_ARB;
// !!! FIXME: geometry shaders?
return GL_NONE;
} // arb1_shader_type
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static int impl_ARB1_MustPushConstantArrays(void) { return 0; }
static int impl_ARB1_MustPushSamplers(void) { return 0; }
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static int impl_ARB1_MaxUniforms(MOJOSHADER_shaderType shader_type)
{
GLint retval = 0;
const GLenum program_type = arb1_shader_type(shader_type);
if (program_type == GL_NONE)
return -1;
ctx->glGetProgramivARB(program_type, GL_MAX_PROGRAM_PARAMETERS_ARB, &retval);
return (int) retval; // !!! FIXME: times four?
} // impl_ARB1_MaxUniforms
static int impl_ARB1_CompileShader(const MOJOSHADER_parseData *pd, GLuint *s)
{
GLint shaderlen = (GLint) pd->output_len;
const GLenum shader_type = arb1_shader_type(pd->shader_type);
GLuint shader = 0;
ctx->glGenProgramsARB(1, &shader);
ctx->glGetError(); // flush any existing error state.
ctx->glBindProgramARB(shader_type, shader);
ctx->glProgramStringARB(shader_type, GL_PROGRAM_FORMAT_ASCII_ARB,
shaderlen, pd->output);
if (ctx->glGetError() == GL_INVALID_OPERATION)
{
GLint pos = 0;
ctx->glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &pos);
const GLubyte *errstr = ctx->glGetString(GL_PROGRAM_ERROR_STRING_ARB);
snprintf(error_buffer, sizeof (error_buffer),
"ARB1 compile error at position %d: %s",
(int) pos, (const char *) errstr);
ctx->glBindProgramARB(shader_type, 0);
ctx->glDeleteProgramsARB(1, &shader);
*s = 0;
return 0;
} // if
*s = shader;
return 1;
} // impl_ARB1_CompileShader
static void impl_ARB1_DeleteShader(const GLuint _shader)
{
GLuint shader = _shader; // const removal.
ctx->glDeleteProgramsARB(1, &shader);
} // impl_ARB1_DeleteShader
static void impl_ARB1_DeleteProgram(const GLuint program)
{
// no-op. ARB1 doesn't have real linked programs.
} // impl_GLSL_DeleteProgram
static GLint impl_ARB1_GetUniformLocation(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader, int idx)
{
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return 0; // no-op, we push this as one big-ass array now.
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} // impl_ARB1_GetUniformLocation
static GLint impl_ARB1_GetSamplerLocation(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader, int idx)
{
return shader->parseData->samplers[idx].index;
} // impl_ARB1_GetSamplerLocation
static GLint impl_ARB1_GetAttribLocation(MOJOSHADER_glProgram *program, int idx)
{
return idx; // map to vertex arrays in the same order as the parseData.
} // impl_ARB1_GetAttribLocation
static GLuint impl_ARB1_LinkProgram(MOJOSHADER_glShader *vshader,
MOJOSHADER_glShader *pshader)
{
// there is no formal linking in ARB1...just return a unique value.
static GLuint retval = 1;
return retval++;
} // impl_ARB1_LinkProgram
601
static void impl_ARB1_FinalInitProgram(MOJOSHADER_glProgram *program)
602
603
{
// no-op.
604
} // impl_ARB1_FinalInitProgram
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
static void impl_ARB1_UseProgramObject(MOJOSHADER_glProgram *program)
{
GLuint vhandle = 0;
GLuint phandle = 0;
if (program != NULL)
{
if (program->vertex != NULL)
vhandle = program->vertex->handle;
if (program->fragment != NULL)
phandle = program->fragment->handle;
} // if
toggle_gl_state(GL_VERTEX_PROGRAM_ARB, vhandle != 0);
toggle_gl_state(GL_FRAGMENT_PROGRAM_ARB, phandle != 0);
ctx->glBindProgramARB(GL_VERTEX_PROGRAM_ARB, vhandle);
ctx->glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, phandle);
} // impl_ARB1_UseProgramObject
627
628
629
static void impl_ARB1_PushConstantArray(MOJOSHADER_glProgram *program,
const MOJOSHADER_uniform *u,
const GLfloat *f)
630
{
631
632
// no-op. Constant arrays are defined in source code for arb1.
} // impl_ARB1_PushConstantArray
633
634
635
static void impl_ARB1_PushUniforms(void)
636
{
637
638
639
// vertex shader uniforms come first in program->uniforms array.
MOJOSHADER_shaderType shader_type = MOJOSHADER_TYPE_VERTEX;
GLenum arb_shader_type = arb1_shader_type(shader_type);
640
const MOJOSHADER_glProgram *program = ctx->bound_program;
641
642
643
644
645
const uint32 count = program->uniform_count;
const GLfloat *srcf = program->vs_uniforms_float4;
const GLint *srci = program->vs_uniforms_int4;
const GLint *srcb = program->vs_uniforms_bool;
GLint loc = 0;
646
uint32 i;
647
648
649
assert(count > 0); // shouldn't call this with nothing to do!
650
651
for (i = 0; i < count; i++)
{
652
UniformMap *map = &program->uniforms[i];
653
const MOJOSHADER_shaderType uniform_shader_type = map->shader_type;
654
655
656
const MOJOSHADER_uniform *u = map->uniform;
const MOJOSHADER_uniformType type = u->type;
const int size = u->array_count ? u->array_count : 1;
657
658
assert(!u->constant);
659
660
// Did we switch from vertex to pixel (to geometry, etc)?
661
if (shader_type != uniform_shader_type)
662
{
663
664
// we start with vertex, move to pixel, then to geometry, etc.
// The array should always be sorted as such.
665
if (uniform_shader_type == MOJOSHADER_TYPE_PIXEL)
666
{
667
assert(shader_type == MOJOSHADER_TYPE_VERTEX);
668
669
670
671
672
673
674
srcf = program->ps_uniforms_float4;
srci = program->ps_uniforms_int4;
srcb = program->ps_uniforms_bool;
loc = 0;
} // if
else
{
675
// These should be ordered vertex, then pixel, then geometry.
676
677
assert(0 && "Unexpected shader type");
} // else
678
679
680
shader_type = uniform_shader_type;
arb_shader_type = arb1_shader_type(uniform_shader_type);
681
} // if
682
683
684
685
if (type == MOJOSHADER_UNIFORM_FLOAT)
{
int i;
686
687
for (i = 0; i < size; i++, srcf += 4, loc++)
ctx->glProgramLocalParameter4fvARB(arb_shader_type, loc, srcf);
688
689
690
691
692
693
694
} // if
else if (type == MOJOSHADER_UNIFORM_INT)
{
int i;
if (ctx->glProgramLocalParameterI4ivNV != NULL)
{
// GL_NV_gpu_program4 has integer uniform loading support.
695
696
for (i = 0; i < size; i++, srci += 4, loc++)
ctx->glProgramLocalParameterI4ivNV(arb_shader_type, loc, srci);
697
698
699
} // if
else
{
700
for (i = 0; i < size; i++, srci += 4, loc++)
701
{
702
703
704
705
706
const GLfloat fv[4] = {
(GLfloat) srci[0], (GLfloat) srci[1],
(GLfloat) srci[2], (GLfloat) srci[3]
};
ctx->glProgramLocalParameter4fvARB(arb_shader_type, loc, fv);
707
708
709
710
711
712
713
714
715
} // for
} // else
} // else if
else if (type == MOJOSHADER_UNIFORM_BOOL)
{
int i;
if (ctx->glProgramLocalParameterI4ivNV != NULL)
{
// GL_NV_gpu_program4 has integer uniform loading support.
716
for (i = 0; i < size; i++, srcb++, loc++)
717
{
718
const GLint ib = (GLint) ((*srcb) ? 1 : 0);
719
const GLint iv[4] = { ib, ib, ib, ib };
720
ctx->glProgramLocalParameterI4ivNV(arb_shader_type, loc, iv);
721
722
723
724
} // for
} // if
else
{
725
for (i = 0; i < size; i++, srcb++, loc++)
726
{
727
const GLfloat fb = (GLfloat) ((*srcb) ? 1.0f : 0.0f);
728
const GLfloat fv[4] = { fb, fb, fb, fb };
729
ctx->glProgramLocalParameter4fvARB(arb_shader_type, loc, fv);
730
731
732
733
734
} // for
} // else
} // else if
} // for
} // impl_ARB1_PushUniforms
735
736
static void impl_ARB1_PushSampler(GLint loc, GLuint sampler)
737
738
739
{
// no-op in this profile...arb1 uses the texture units as-is.
assert(loc == (GLint) sampler);
740
} // impl_ARB1_PushSampler
741
742
743
744
745
746
747
748
749
750
#endif // SUPPORT_PROFILE_ARB1
const char *MOJOSHADER_glGetError(void)
{
return error_buffer;
} // MOJOSHADER_glGetError
751
752
static void *loadsym(MOJOSHADER_glGetProcAddress lookup, void *d,
const char *fn, int *ext)
753
754
755
756
{
void *retval = NULL;
if (lookup != NULL)
{
757
retval = lookup(fn, d);
758
759
760
761
if (retval == NULL)
{
char arbfn[64];
snprintf(arbfn, sizeof (arbfn), "%sARB", fn);
762
retval = lookup(arbfn, d);
763
764
765
766
767
768
769
770
771
} // if
} // if
if (retval == NULL)
*ext = 0;
return retval;
} // loadsym
772
static void lookup_entry_points(MOJOSHADER_glGetProcAddress lookup, void *d)
773
{
774
775
#define DO_LOOKUP(ext, typ, fn) { \
int exist = ctx->have_##ext; \
776
ctx->fn = (typ) loadsym(lookup, d, #fn, &exist); \
777
778
779
ctx->have_##ext = exist; \
}
780
DO_LOOKUP(base_opengl, PFNGLGETSTRINGPROC, glGetString);
781
DO_LOOKUP(base_opengl, PFNGLGETERRORPROC, glGetError);
782
DO_LOOKUP(base_opengl, PFNGLGETINTEGERVPROC, glGetIntegerv);
783
784
DO_LOOKUP(base_opengl, PFNGLENABLEPROC, glEnable);
DO_LOOKUP(base_opengl, PFNGLDISABLEPROC, glDisable);
785
786
787
788
789
790
791
792
793
794
795
DO_LOOKUP(GL_ARB_shader_objects, PFNGLDELETEOBJECTARBPROC, glDeleteObject);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLATTACHOBJECTARBPROC, glAttachObject);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLCOMPILESHADERARBPROC, glCompileShader);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLCREATEPROGRAMOBJECTARBPROC, glCreateProgramObject);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLCREATESHADEROBJECTARBPROC, glCreateShaderObject);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLGETINFOLOGARBPROC, glGetInfoLog);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLGETOBJECTPARAMETERIVARBPROC, glGetObjectParameteriv);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLGETUNIFORMLOCATIONARBPROC, glGetUniformLocation);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLLINKPROGRAMARBPROC, glLinkProgram);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLSHADERSOURCEARBPROC, glShaderSource);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUNIFORM1IARBPROC, glUniform1i);
796
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUNIFORM1IVARBPROC, glUniform1iv);
797
798
799
800
801
802
803
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUNIFORM4FVARBPROC, glUniform4fv);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUNIFORM4IVARBPROC, glUniform4iv);
DO_LOOKUP(GL_ARB_shader_objects, PFNGLUSEPROGRAMOBJECTARBPROC, glUseProgramObject);
DO_LOOKUP(GL_ARB_vertex_shader, PFNGLDISABLEVERTEXATTRIBARRAYARBPROC, glDisableVertexAttribArray);
DO_LOOKUP(GL_ARB_vertex_shader, PFNGLENABLEVERTEXATTRIBARRAYARBPROC, glEnableVertexAttribArray);
DO_LOOKUP(GL_ARB_vertex_shader, PFNGLGETATTRIBLOCATIONARBPROC, glGetAttribLocation);
DO_LOOKUP(GL_ARB_vertex_shader, PFNGLVERTEXATTRIBPOINTERARBPROC, glVertexAttribPointer);
804
805
806
DO_LOOKUP(GL_ARB_vertex_program, PFNGLVERTEXATTRIBPOINTERARBPROC, glVertexAttribPointer);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLGETPROGRAMIVARBPROC, glGetProgramivARB);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLGETPROGRAMSTRINGARBPROC, glGetProgramStringARB);
807
DO_LOOKUP(GL_ARB_vertex_program, PFNGLPROGRAMLOCALPARAMETER4FVARBPROC, glProgramLocalParameter4fvARB);
808
809
810
811
DO_LOOKUP(GL_ARB_vertex_program, PFNGLDELETEPROGRAMSARBPROC, glDeleteProgramsARB);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLGENPROGRAMSARBPROC, glGenProgramsARB);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLBINDPROGRAMARBPROC, glBindProgramARB);
DO_LOOKUP(GL_ARB_vertex_program, PFNGLPROGRAMSTRINGARBPROC, glProgramStringARB);
812
DO_LOOKUP(GL_NV_gpu_program4, PFNGLPROGRAMLOCALPARAMETERI4IVNVPROC, glProgramLocalParameterI4ivNV);
813
814
815
816
817
818
819
820
821
822
823
#undef DO_LOOKUP
} // lookup_entry_points
static int verify_extension(const char *ext, int have, const char *extlist,
int major, int minor)
{
if (have == 0)
return 0; // don't bother checking, we're missing an entry point.
824
825
826
else if (!ctx->have_base_opengl)
return 0; // don't bother checking, we're missing basic functionality.
827
// See if it's in the spec for this GL implementation's version.
828
829
if (major >= 0)
{
830
if ( ((ctx->opengl_major << 16) | (ctx->opengl_minor & 0xFFFF)) >=
831
832
833
((major << 16) | (minor & 0xFFFF)) )
return 1;
} // if
834
835
836
837
838
839
840
841
842
843
844
845
846
847
// Not available in the GL version, check the extension list.
const char *ptr = strstr(extlist, ext);
if (ptr == NULL)
return 0;
const char endchar = ptr[strlen(ext)];
if ((endchar == '\0') || (endchar == ' '))
return 1; // extension is in the list.
return 0; // just not supported, fail.
} // verify_extension
848
static void parse_opengl_version_str(const char *verstr, int *maj, int *min)
849
850
{
if (verstr == NULL)
851
*maj = *min = 0;
852
else
853
854
855
856
857
858
859
sscanf(verstr, "%d.%d", maj, min);
} // parse_opengl_version_str
static inline void parse_opengl_version(const char *verstr)
{
parse_opengl_version_str(verstr, &ctx->opengl_major, &ctx->opengl_minor);
860
861
862
} // parse_opengl_version
863
#if SUPPORT_PROFILE_GLSL
864
865
866
867
868
869
870
871
872
873
874
875
static int glsl_version_atleast(int maj, int min)
{
int glslmin = 0;
int glslmaj = 0;
ctx->glGetError(); // flush any existing error state.
const GLenum enumval = GL_SHADING_LANGUAGE_VERSION_ARB;
const char *str = (const char *) ctx->glGetString(enumval);
if (ctx->glGetError() == GL_INVALID_ENUM)
return 0; // this is a basic, 1.0-compliant implementation.
parse_opengl_version_str(str, &glslmaj, &glslmin);
return ( (glslmaj > maj) || ((glslmaj == maj) && (glslmin >= min)) );
} // glsl_version_atleast
876
#endif
877
878
879
static void load_extensions(MOJOSHADER_glGetProcAddress lookup, void *d)
880
{
881
882
const char *extlist = NULL;
883
ctx->have_base_opengl = 1;
884
885
ctx->have_GL_ARB_vertex_program = 1;
ctx->have_GL_ARB_fragment_program = 1;
886
887
ctx->have_GL_NV_vertex_program2_option = 1;
ctx->have_GL_NV_fragment_program2 = 1;
888
ctx->have_GL_NV_vertex_program3 = 1;
889
ctx->have_GL_NV_gpu_program4 = 1;
890
891
892
893
894
ctx->have_GL_ARB_shader_objects = 1;
ctx->have_GL_ARB_vertex_shader = 1;
ctx->have_GL_ARB_fragment_shader = 1;
ctx->have_GL_ARB_shading_language_100 = 1;
ctx->have_GL_NV_half_float = 1;
895
896
ctx->have_GL_ARB_half_float_vertex = 1;
ctx->have_GL_OES_vertex_half_float = 1;
897
898
lookup_entry_points(lookup, d);
899
900
if (!ctx->have_base_opengl)
901
set_error("missing basic OpenGL entry points");
902
903
904
905
906
else
{
parse_opengl_version((const char *) ctx->glGetString(GL_VERSION));
extlist = (const char *) ctx->glGetString(GL_EXTENSIONS);
} // else
907
908
909
910
911
if (extlist == NULL)
extlist = ""; // just in case.
#define VERIFY_EXT(ext, major, minor) \
912
ctx->have_##ext = verify_extension(#ext, ctx->have_##ext, extlist, major, minor)
913
914
915
VERIFY_EXT(GL_ARB_vertex_program, -1, -1);
VERIFY_EXT(GL_ARB_fragment_program, -1, -1);
916
917
918
919
VERIFY_EXT(GL_ARB_shader_objects, 2, 0);
VERIFY_EXT(GL_ARB_vertex_shader, 2, 0);
VERIFY_EXT(GL_ARB_fragment_shader, 2, 0);
VERIFY_EXT(GL_ARB_shading_language_100, 2, 0);
920
921
VERIFY_EXT(GL_NV_vertex_program2_option, -1, -1);
VERIFY_EXT(GL_NV_fragment_program2, -1, -1);
922
VERIFY_EXT(GL_NV_vertex_program3, -1, -1);
923
VERIFY_EXT(GL_NV_half_float, -1, -1);
924
925
VERIFY_EXT(GL_ARB_half_float_vertex, 3, 0);
VERIFY_EXT(GL_OES_vertex_half_float, -1, -1);
926
927
#undef VERIFY_EXT
928
929
930
931
932
} // load_extensions
static int valid_profile(const char *profile)
{
933
#if SUPPORT_PROFILE_GLSL
934
935
936
937
938
// If running on Mac OS X <= 10.4, don't ever pick GLSL, even if
// the system claims it is available.
#if PLATFORM_MACOSX
const int allow_glsl = macosx_version_atleast(10, 5, 0);
#else
939
const int allow_glsl = 1;
940
#endif
941
#endif
942
943
944
if (!ctx->have_base_opengl)
return 0;
945
946
947
#define MUST_HAVE(p, x) \
if (!ctx->have_##x) { set_error(#p " profile needs " #x); return 0; }
948
949
950
951
952
953
if (profile == NULL)
{
set_error("NULL profile");
return 0;
} // if
954
955
956
957
958
959
960
#if SUPPORT_PROFILE_ARB1
else if (strcmp(profile, MOJOSHADER_PROFILE_ARB1) == 0)
{
MUST_HAVE(MOJOSHADER_PROFILE_ARB1, GL_ARB_vertex_program);
MUST_HAVE(MOJOSHADER_PROFILE_ARB1, GL_ARB_fragment_program);
} // else if
961
#endif
962
963
#if SUPPORT_PROFILE_ARB1_NV
964
965
966
967
968
969
970
else if (strcmp(profile, MOJOSHADER_PROFILE_NV2) == 0)
{
MUST_HAVE(MOJOSHADER_PROFILE_NV2, GL_ARB_vertex_program);
MUST_HAVE(MOJOSHADER_PROFILE_NV2, GL_ARB_fragment_program);
MUST_HAVE(MOJOSHADER_PROFILE_NV2, GL_NV_vertex_program2_option);
MUST_HAVE(MOJOSHADER_PROFILE_NV2, GL_NV_fragment_program2);
} // else if
971
972
973
974
975
976
977
978
else if (strcmp(profile, MOJOSHADER_PROFILE_NV3) == 0)
{
MUST_HAVE(MOJOSHADER_PROFILE_NV3, GL_ARB_vertex_program);
MUST_HAVE(MOJOSHADER_PROFILE_NV3, GL_ARB_fragment_program);
MUST_HAVE(MOJOSHADER_PROFILE_NV3, GL_NV_vertex_program3);
MUST_HAVE(MOJOSHADER_PROFILE_NV3, GL_NV_fragment_program2);
} // else if
979
980
981
982
983
else if (strcmp(profile, MOJOSHADER_PROFILE_NV4) == 0)
{
MUST_HAVE(MOJOSHADER_PROFILE_NV4, GL_NV_gpu_program4);
} // else if
984
985
#endif
986
#if SUPPORT_PROFILE_GLSL120
987
else if ((allow_glsl) && (strcmp(profile, MOJOSHADER_PROFILE_GLSL120) == 0))
988
989
990
991
992
993
{
MUST_HAVE(MOJOSHADER_PROFILE_GLSL, GL_ARB_shader_objects);
MUST_HAVE(MOJOSHADER_PROFILE_GLSL, GL_ARB_vertex_shader);
MUST_HAVE(MOJOSHADER_PROFILE_GLSL, GL_ARB_fragment_shader);
MUST_HAVE(MOJOSHADER_PROFILE_GLSL, GL_ARB_shading_language_100);
// if you got here, you have all the extensions.
994
if (!glsl_version_atleast(1, 20))
995
996
return 0;
} // else if
997
#endif
998
999
#if SUPPORT_PROFILE_GLSL
1000
else if ((allow_glsl) && (strcmp(profile, MOJOSHADER_PROFILE_GLSL) == 0))