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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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#ifdef _MSC_VER
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h> // GL headers need this for WINGDIAPI definition.
#endif
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#include "mojoshader.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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// Get basic wankery out of the way here...
typedef unsigned int uint; // this is a printf() helper. don't use for code.
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#ifdef _MSC_VER
#define snprintf _snprintf
typedef unsigned __int8 uint8;
typedef unsigned __int32 uint32;
typedef unsigned __int32 int32;
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// Warning Level 4 considered harmful. :)
#pragma warning(disable: 4100) // "unreferenced formal parameter"
#pragma warning(disable: 4389) // "signed/unsigned mismatch"
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#else
#include <stdint.h>
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typedef uint8_t uint8;
typedef uint32_t uint32;
typedef int32_t int32;
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#endif
#define STATICARRAYLEN(x) ( (sizeof ((x))) / (sizeof ((x)[0])) )
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#ifndef SUPPORT_PROFILE_GLSL
#define SUPPORT_PROFILE_GLSL 1
#endif
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struct MOJOSHADER_glShader
{
const MOJOSHADER_parseData *parseData;
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GLhandleARB 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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GLuint location;
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} UniformMap;
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typedef struct
{
MOJOSHADER_shaderType shader_type;
const MOJOSHADER_sampler *sampler;
GLuint location;
} SamplerMap;
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typedef struct
{
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const MOJOSHADER_attribute *attribute;
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GLuint 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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GLhandleARB handle;
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uint32 constant_count; // !!! FIXME: misnamed.
GLfloat *constants; // !!! FIXME: misnamed.
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uint32 uniform_count;
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UniformMap *uniforms;
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uint32 sampler_count;
SamplerMap *samplers;
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uint32 attribute_count;
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AttributeMap *attributes;
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uint32 refcount;
};
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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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struct MOJOSHADER_glContext
{
// Allocators...
MOJOSHADER_malloc malloc_fn;
MOJOSHADER_free free_fn;
void *malloc_data;
// The constant register files...
// Man, it kills me how much memory this takes...
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GLfloat vs_reg_file_f[8192 * 4];
GLint vs_reg_file_i[2047 * 4];
GLint vs_reg_file_b[2047];
GLfloat ps_reg_file_f[8192 * 4];
GLint ps_reg_file_i[2047 * 4];
GLint ps_reg_file_b[2047];
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GLuint sampler_reg_file[16];
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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...
int have_base_opengl;
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;
// Entry points...
PFNGLGETSTRINGPROC glGetString;
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PFNGLGETINTEGERVPROC glGetIntegerv;
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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;
PFNGLUNIFORM1IARBPROC glUniform1i;
PFNGLUNIFORM4FVARBPROC glUniform4fv;
PFNGLUNIFORM4IVARBPROC glUniform4iv;
PFNGLUSEPROGRAMOBJECTARBPROC glUseProgramObject;
PFNGLVERTEXATTRIBPOINTERARBPROC glVertexAttribPointer;
};
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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// #define this to force app to supply an allocator, so there's no reference
// to the C runtime's malloc() and free()...
#if MOJOSHADER_FORCE_ALLOCATOR
#define internal_malloc NULL
#define internal_free NULL
#else
static void *internal_malloc(int bytes, void *d) { return malloc(bytes); }
static void internal_free(void *ptr, void *d) { free(ptr); }
#endif
static inline void *Malloc(const size_t len)
{
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void *retval = ctx->malloc_fn(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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const char *MOJOSHADER_glGetError(void)
{
return error_buffer;
} // MOJOSHADER_glGetError
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static void *loadsym(void *(*lookup)(const char *fn), const char *fn, int *ext)
{
void *retval = NULL;
if (lookup != NULL)
{
retval = lookup(fn);
if (retval == NULL)
{
char arbfn[64];
snprintf(arbfn, sizeof (arbfn), "%sARB", fn);
retval = lookup(arbfn);
} // if
} // if
if (retval == NULL)
*ext = 0;
return retval;
} // loadsym
static void lookup_entry_points(void *(*lookup)(const char *fnname))
{
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#define DO_LOOKUP(ext, typ, fn) ctx->fn = (typ) loadsym(lookup, #fn, &ctx->have_##ext)
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DO_LOOKUP(base_opengl, PFNGLGETSTRINGPROC, glGetString);
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DO_LOOKUP(base_opengl, PFNGLGETINTEGERVPROC, glGetIntegerv);
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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);
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);
#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.
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else if (!ctx->have_base_opengl)
return 0; // don't bother checking, we're missing basic functionality.
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// See if it's in the spec for this GL implementation's version.
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if (major >= 0)
{
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if ( ((ctx->opengl_major << 16) | (ctx->opengl_minor & 0xFFFF)) >=
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((major << 16) | (minor & 0xFFFF)) )
return 1;
} // if
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// 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
static void parse_opengl_version(const char *verstr)
{
if (verstr == NULL)
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ctx->opengl_major = ctx->opengl_minor = 0;
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else
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sscanf(verstr, "%d.%d", &ctx->opengl_major, &ctx->opengl_minor);
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} // parse_opengl_version
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static void load_extensions(void *(*lookup)(const char *fnname))
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{
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const char *extlist = NULL;
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ctx->have_base_opengl = 1;
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;
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lookup_entry_points(lookup);
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if (!ctx->have_base_opengl)
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set_error("missing basic OpenGL entry points");
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else
{
parse_opengl_version((const char *) ctx->glGetString(GL_VERSION));
extlist = (const char *) ctx->glGetString(GL_EXTENSIONS);
} // else
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if (extlist == NULL)
extlist = ""; // just in case.
#define VERIFY_EXT(ext, major, minor) \
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ctx->have_##ext = verify_extension(#ext, ctx->have_##ext, extlist, major, minor)
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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);
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VERIFY_EXT(GL_NV_half_float, -1, -1);
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#undef VERIFY_EXT
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} // load_extensions
static int valid_profile(const char *profile)
{
if (!ctx->have_base_opengl)
return 0;
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#define MUST_HAVE(p, x) \
if (!ctx->have_##x) { set_error(#p " profile needs " #x); return 0; }
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if (profile == NULL)
{
set_error("NULL profile");
return 0;
} // if
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#if SUPPORT_PROFILE_GLSL
else if (strcmp(profile, MOJOSHADER_PROFILE_GLSL) == 0)
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{
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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);
} // else if
#endif
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else
{
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set_error("unknown or unsupported profile");
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return 0;
} // else
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#undef MUST_HAVE
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return 1;
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} // valid_profile
const char *MOJOSHADER_glBestProfile(void *(*lookup)(const char *fnname))
{
const char *retval = NULL;
MOJOSHADER_glContext _ctx;
MOJOSHADER_glContext *current_ctx = ctx;
ctx = &_ctx;
memset(ctx, '\0', sizeof (MOJOSHADER_glContext));
load_extensions(lookup);
if (ctx->have_base_opengl)
{
static const char *priority[] = {
MOJOSHADER_PROFILE_GLSL,
};
int i;
for (i = 0; i < STATICARRAYLEN(priority); i++)
{
if (valid_profile(priority[i]))
{
retval = priority[i];
break;
} // if
} // for
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if (retval == NULL)
set_error("no profiles available");
} // if
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ctx = current_ctx;
return retval;
} // MOJOSHADER_glBestProfile
MOJOSHADER_glContext *MOJOSHADER_glCreateContext(const char *profile,
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void *(*lookup)(const char *fnname),
MOJOSHADER_malloc m, MOJOSHADER_free f,
void *d)
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{
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MOJOSHADER_glContext *retval = NULL;
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MOJOSHADER_glContext *current_ctx = ctx;
ctx = NULL;
if (m == NULL) m = internal_malloc;
if (f == NULL) f = internal_free;
ctx = (MOJOSHADER_glContext *) m(sizeof (MOJOSHADER_glContext), d);
if (ctx == NULL)
{
set_error("out of memory");
goto init_fail;
} // if
memset(ctx, '\0', sizeof (MOJOSHADER_glContext));
ctx->malloc_fn = m;
ctx->free_fn = f;
ctx->malloc_data = d;
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snprintf(ctx->profile, sizeof (ctx->profile), "%s", profile);
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load_extensions(lookup);
if (!valid_profile(profile))
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goto init_fail;
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MOJOSHADER_glBindProgram(NULL);
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retval = ctx;
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ctx = current_ctx;
return retval;
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init_fail:
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if (ctx != NULL)
f(ctx, d);
ctx = current_ctx;
return NULL;
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} // MOJOSHADER_glCreateContext
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void MOJOSHADER_glMakeContextCurrent(MOJOSHADER_glContext *_ctx)
{
ctx = _ctx;
} // MOJOSHADER_glMakeContextCurrent
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int MOJOSHADER_glMaxUniforms(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;
} // MOJOSHADER_glMaxUniforms
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MOJOSHADER_glShader *MOJOSHADER_glCompileShader(const unsigned char *tokenbuf,
const unsigned int bufsize)
{
MOJOSHADER_glShader *retval = NULL;
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GLhandleARB shader = 0;
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const MOJOSHADER_parseData *pd = MOJOSHADER_parse(ctx->profile, tokenbuf,
bufsize, ctx->malloc_fn,
ctx->free_fn,
ctx->malloc_data);
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GLint ok = 0;
const GLenum shader_type = (pd->shader_type == MOJOSHADER_TYPE_PIXEL) ? GL_FRAGMENT_SHADER : GL_VERTEX_SHADER;
GLint shaderlen = (GLint) pd->output_len;
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if (pd->error != NULL)
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{
set_error(pd->error);
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goto compile_shader_fail;
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} // if
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retval = (MOJOSHADER_glShader *) Malloc(sizeof (MOJOSHADER_glShader));
if (retval == NULL)
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goto compile_shader_fail;
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shader = ctx->glCreateShaderObject(shader_type);
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ctx->glShaderSource(shader, 1, (const GLchar **) &pd->output, &shaderlen);
ctx->glCompileShader(shader);
ctx->glGetObjectParameteriv(shader, GL_OBJECT_COMPILE_STATUS_ARB, &ok);
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if (!ok)
{
GLsizei len = 0;
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ctx->glGetInfoLog(shader, sizeof (error_buffer), &len, (GLchar *) error_buffer);
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goto compile_shader_fail;
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} // if
retval->parseData = pd;
retval->handle = shader;
retval->refcount = 1;
return retval;
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compile_shader_fail:
MOJOSHADER_freeParseData(pd);
Free(retval);
if (shader != 0)
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ctx->glDeleteObject(shader);
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return NULL;
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} // MOJOSHADER_glCompileShader
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const MOJOSHADER_parseData *MOJOSHADER_glGetShaderParseData(
MOJOSHADER_glShader *shader)
{
return (shader != NULL) ? shader->parseData : NULL;
} // MOJOSHADER_glGetShaderParseData
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static void shader_unref(MOJOSHADER_glShader *shader)
{
if (shader != NULL)
{
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const uint32 refcount = shader->refcount;
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if (refcount > 1)
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shader->refcount--;
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else
{
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ctx->glDeleteObject(shader->handle);
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MOJOSHADER_freeParseData(shader->parseData);
Free(shader);
} // else
} // if
} // shader_unref
static void program_unref(MOJOSHADER_glProgram *program)
{
if (program != NULL)
{
const uint32 refcount = program->refcount;
if (refcount > 1)
program->refcount--;
else
{
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ctx->glDeleteObject(program->handle);
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shader_unref(program->vertex);
shader_unref(program->fragment);
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Free(program->constants);
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Free(program->samplers);
Free(program->uniforms);
Free(program->attributes);
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Free(program);
} // else
} // if
} // program_unref
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static void lookup_uniforms(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader)
{
int i;
const MOJOSHADER_parseData *pd = shader->parseData;
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const MOJOSHADER_uniform *u = pd->uniforms;
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const MOJOSHADER_shaderType shader_type = pd->shader_type;
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for (i = 0; i < pd->uniform_count; i++)
{
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const GLint loc = ctx->glGetUniformLocation(program->handle, u[i].name);
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if (loc != -1) // maybe the Uniform was optimized out?
{
UniformMap *map = &program->uniforms[program->uniform_count];
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map->shader_type = shader_type;
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map->uniform = &u[i];
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map->location = (GLuint) loc;
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program->uniform_count++;
} // if
} // for
} // lookup_uniforms
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static void lookup_samplers(MOJOSHADER_glProgram *program,
MOJOSHADER_glShader *shader)
{
int i;
const MOJOSHADER_parseData *pd = shader->parseData;
const MOJOSHADER_sampler *s = pd->samplers;
const MOJOSHADER_shaderType shader_type = pd->shader_type;
for (i = 0; i < pd->sampler_count; i++)
{
const GLint loc = ctx->glGetUniformLocation(program->handle, s[i].name);
if (loc != -1) // maybe the Sampler was optimized out?
{
SamplerMap *map = &program->samplers[program->sampler_count];
map->shader_type = shader_type;
map->sampler = &s[i];
map->location = (GLuint) loc;
program->sampler_count++;
} // if
} // for
} // lookup_samplers
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static void lookup_attributes(MOJOSHADER_glProgram *program)
{
int i;
const MOJOSHADER_parseData *pd = program->vertex->parseData;
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const MOJOSHADER_attribute *a = pd->attributes;
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for (i = 0; i < pd->attribute_count; i++)
{
608
const GLint loc = ctx->glGetAttribLocation(program->handle, a->name);
609
610
611
612
if (loc != -1) // maybe the Attribute was optimized out?
{
AttributeMap *map = &program->attributes[program->attribute_count];
map->attribute = &a[i];
613
map->location = (GLuint) loc;
614
615
616
617
618
619
program->attribute_count++;
} // if
} // for
} // lookup_attributes
620
621
622
MOJOSHADER_glProgram *MOJOSHADER_glLinkProgram(MOJOSHADER_glShader *vshader,
MOJOSHADER_glShader *pshader)
{
623
624
625
if ((vshader == NULL) && (pshader == NULL))
return NULL;
626
MOJOSHADER_glProgram *retval = NULL;
627
const GLhandleARB program = ctx->glCreateProgramObject();
628
int numregs = 0;
629
uint32 const_count = 0;
630
631
632
if (vshader != NULL) ctx->glAttachObject(program, vshader->handle);
if (pshader != NULL) ctx->glAttachObject(program, pshader->handle);
633
634
ctx->glLinkProgram(program);
635
636
GLint ok = 0;
637
ctx->glGetObjectParameteriv(program, GL_OBJECT_LINK_STATUS_ARB, &ok);
638
639
640
if (!ok)
{
GLsizei len = 0;
641
ctx->glGetInfoLog(program, sizeof (error_buffer), &len, (GLchar *) error_buffer);
642
643
goto link_program_fail;
} // if
644
645
646
retval = (MOJOSHADER_glProgram *) Malloc(sizeof (MOJOSHADER_glProgram));
if (retval == NULL)
647
648
goto link_program_fail;
memset(retval, '\0', sizeof (MOJOSHADER_glProgram));
649
650
numregs = 0;
651
652
if (vshader != NULL) numregs += vshader->parseData->uniform_count;
if (pshader != NULL) numregs += pshader->parseData->uniform_count;
653
654
655
retval->uniforms = (UniformMap *) Malloc(sizeof (UniformMap) * numregs);
if (retval->uniforms == NULL)
goto link_program_fail;
656
memset(retval->uniforms, '\0', sizeof (UniformMap) * numregs);
657
658
659
660
661
662
663
664
665
numregs = 0;
if (vshader != NULL) numregs += vshader->parseData->sampler_count;
if (pshader != NULL) numregs += pshader->parseData->sampler_count;
retval->samplers = (SamplerMap *) Malloc(sizeof (SamplerMap) * numregs);
if (retval->samplers == NULL)
goto link_program_fail;
memset(retval->samplers, '\0', sizeof (SamplerMap) * numregs);
666
667
668
669
retval->handle = program;
retval->vertex = vshader;
retval->fragment = pshader;
retval->refcount = 1;
670
671
if (vshader != NULL)
672
{
673
674
if (const_count < vshader->parseData->constant_count)
const_count = vshader->parseData->constant_count;
675
676
677
678
679
680
retval->attributes = (AttributeMap *) Malloc(sizeof (AttributeMap) *
vshader->parseData->attribute_count);
if (retval->attributes == NULL)
goto link_program_fail;
lookup_attributes(retval);
681
lookup_uniforms(retval, vshader);
682
lookup_samplers(retval, vshader);
683
vshader->refcount++;
684
685
} // if
686
if (pshader != NULL)
687
{
688
689
690
if (const_count < pshader->parseData->constant_count)
const_count = pshader->parseData->constant_count;
691
lookup_uniforms(retval, pshader);
692
lookup_samplers(retval, vshader);
693
pshader->refcount++;
694
} // if
695
696
697
698
699
700
701
702
703
if (const_count > 0)
{
retval->constants = (GLfloat *) Malloc(sizeof (GLfloat) * const_count);
if (retval->constants == NULL)
goto link_program_fail;
retval->constant_count = const_count;
} // if
704
return retval;
705
706
707
708
link_program_fail:
if (retval != NULL)
{
709
710
Free(retval->constants);
Free(retval->samplers);
711
712
Free(retval->uniforms);
Free(retval->attributes);
713
714
715
Free(retval);
} // if
716
ctx->glDeleteObject(program);
717
return NULL;
718
719
720
721
722
} // MOJOSHADER_glLinkProgram
void MOJOSHADER_glBindProgram(MOJOSHADER_glProgram *program)
{
723
GLhandleARB handle = 0;
724
int i;
725
726
if (program == ctx->bound_program)
727
728
729
return; // nothing to do.
// Disable any client-side arrays the current program could have used.
730
731
// !!! FIXME: don't disable yet...see which ones get reused, and disable
// !!! FIXME: only what we don't need in MOJOSHADER_glProgramReady().
732
if (ctx->bound_program != NULL)
733
{
734
735
const int count = ctx->bound_program->attribute_count;
for (i = 0; i < count; i++)
736
{
737
738
const AttributeMap *map = &ctx->bound_program->attributes[i];
ctx->glDisableVertexAttribArray(map->location);
739
740
741
} // if
} // for
742
743
744
745
746
747
if (program != NULL)
{
handle = program->handle;
program->refcount++;
} // if
748
749
750
ctx->glUseProgramObject(handle);
program_unref(ctx->bound_program);
ctx->bound_program = program;
751
752
753
} // MOJOSHADER_glBindProgram
754
static inline uint minuint(const uint a, const uint b)
755
{
756
757
return ((a < b) ? a : b);
} // minuint
758
759
760
void MOJOSHADER_glSetVertexShaderUniformF(unsigned int idx, const float *data,
761
unsigned int vec4n)
762
{
763
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_f) / 4;
764
765
if (idx < maxregs)
{
766
assert(sizeof (GLfloat) == sizeof (float));
767
const uint cpy = (minuint(maxregs - idx, vec4n) * sizeof (*data)) * 4;
768
memcpy(ctx->vs_reg_file_f + (idx * 4), data, cpy);
769
} // if
770
771
772
773
} // MOJOSHADER_glSetVertexShaderUniformF
void MOJOSHADER_glSetVertexShaderUniformI(unsigned int idx, const int *data,
774
unsigned int ivec4n)
775
{
776
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_i) / 4;
777
778
if (idx < maxregs)
{
779
assert(sizeof (GLint) == sizeof (int));
780
const uint cpy = (minuint(maxregs - idx, ivec4n) * sizeof (*data)) * 4;
781
memcpy(ctx->vs_reg_file_i + (idx * 4), data, cpy);
782
} // if
783
784
785
786
787
788
} // MOJOSHADER_glSetVertexShaderUniformI
void MOJOSHADER_glSetVertexShaderUniformB(unsigned int idx, const int *data,
unsigned int bcount)
{
789
const uint maxregs = STATICARRAYLEN(ctx->vs_reg_file_f) / 4;
790
791
if (idx < maxregs)
{
792
GLint *wptr = ctx->vs_reg_file_b + idx;
793
GLint *endptr = wptr + minuint(maxregs - idx, bcount);
794
795
796
while (wptr != endptr)
*(wptr++) = *(data++) ? 1 : 0;
} // if
797
798
799
800
} // MOJOSHADER_glSetVertexShaderUniformB
void MOJOSHADER_glSetPixelShaderUniformF(unsigned int idx, const float *data,
801
unsigned int vec4n)
802
{
803
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_f) / 4;
804
805
if (idx < maxregs)
{
806
assert(sizeof (GLfloat) == sizeof (float));
807
const uint cpy = (minuint(maxregs - idx, vec4n) * sizeof (*data)) * 4;
808
memcpy(ctx->ps_reg_file_f + (idx * 4), data, cpy);
809
} // if
810
811
812
813
} // MOJOSHADER_glSetPixelShaderUniformF
void MOJOSHADER_glSetPixelShaderUniformI(unsigned int idx, const int *data,
814
unsigned int ivec4n)
815
{
816
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_i) / 4;
817
818
if (idx < maxregs)
{
819
assert(sizeof (GLint) == sizeof (int));
820
const uint cpy = (minuint(maxregs - idx, ivec4n) * sizeof (*data)) * 4;
821
memcpy(ctx->ps_reg_file_i + (idx * 4), data, cpy);
822
} // if
823
824
825
826
} // MOJOSHADER_glSetPixelShaderUniformI
void MOJOSHADER_glSetPixelShaderUniformB(unsigned int idx, const int *data,
827
unsigned int bcount)
828
{
829
const uint maxregs = STATICARRAYLEN(ctx->ps_reg_file_f) / 4;
830
831
if (idx < maxregs)
{
832
GLint *wptr = ctx->ps_reg_file_b + idx;
833
GLint *endptr = wptr + minuint(maxregs - idx, bcount);
834
835
836
while (wptr != endptr)
*(wptr++) = *(data++) ? 1 : 0;
} // if
837
838
839
} // MOJOSHADER_glSetPixelShaderUniformB
840
841
842
843
844
845
846
847
void MOJOSHADER_glSetSampler(unsigned int idx, unsigned int unit)
{
const uint maxregs = STATICARRAYLEN(ctx->sampler_reg_file);
if (idx < maxregs)
ctx->sampler_reg_file[idx] = (GLuint) unit;
} // MOJOSHADER_glSetSampler
848
849
850
851
static inline GLenum opengl_attr_type(const MOJOSHADER_attributeType type)
{
switch (type)
{
852
case MOJOSHADER_ATTRIBUTE_UNKNOWN: return GL_NONE; // oh well.
853
854
855
case MOJOSHADER_ATTRIBUTE_BYTE: return GL_BYTE;
case MOJOSHADER_ATTRIBUTE_UBYTE: return GL_UNSIGNED_BYTE;
case MOJOSHADER_ATTRIBUTE_SHORT: return GL_SHORT;
856
case MOJOSHADER_ATTRIBUTE_USHORT: return GL_UNSIGNED_SHORT;
857
858
859
860
case MOJOSHADER_ATTRIBUTE_INT: return GL_INT;
case MOJOSHADER_ATTRIBUTE_UINT: return GL_UNSIGNED_INT;
case MOJOSHADER_ATTRIBUTE_FLOAT: return GL_FLOAT;
case MOJOSHADER_ATTRIBUTE_DOUBLE: return GL_DOUBLE;
861
862
case MOJOSHADER_ATTRIBUTE_HALF_FLOAT:
863
if (ctx->have_GL_NV_half_float)
864
865
return GL_HALF_FLOAT_NV;
break;
866
867
868
869
870
871
} // switch
return GL_NONE; // oh well. Raises a GL error later.
} // opengl_attr_type
872
// !!! FIXME: shouldn't (index) be unsigned?
873
874
875
876
877
878
void MOJOSHADER_glSetVertexAttribute(MOJOSHADER_usage usage,
int index, unsigned int size,
MOJOSHADER_attributeType type,
int normalized, unsigned int stride,
const void *ptr)
{
879
if ((ctx->bound_program == NULL) || (ctx->bound_program->vertex == NULL))
880
881
return;
882
883
884
const GLenum gl_type = opengl_attr_type(type);
const GLboolean norm = (normalized) ? GL_TRUE : GL_FALSE;
GLuint gl_index = 0;
885
886
887
888
// We have to map POSITION0 to generic vertex attribute 0; the
// GL_ARB_vertex_shader spec says this is equivalent to using
// glVertexPointer(), but without the limitations of that entry point.
889
890
if ((usage != MOJOSHADER_USAGE_POSITION) || (index != 0))
891
{
892
893
894
895
896
897
int i;
const int count = ctx->bound_program->attribute_count;
for (i = 0; i < count; i++)
{
const AttributeMap *map = &ctx->bound_program->attributes[i];
const MOJOSHADER_attribute *a = map->attribute;
898
899
900
// !!! FIXME: is this array guaranteed to be sorted by usage?
// !!! FIXME: if so, we can break if a->usage > usage.
901
902
903
904
905
906
907
if ((a->usage == usage) && (a->index == index))
{
gl_index = map->location;
break;
} // if
} // for
908
909
910
if (gl_index == 0)
return; // nothing to do, this shader doesn't use this stream.
911
} // if
912
913
914
ctx->glVertexAttribPointer(gl_index, size, gl_type, norm, stride, ptr);
ctx->glEnableVertexAttribArray(gl_index);
915
916
917
918
919
} // MOJOSHADER_glSetVertexAttribute
void MOJOSHADER_glProgramReady(void)
{
920
int i;
921
int count;
922
923
if (ctx->bound_program == NULL)
924
925
return; // nothing to do.
926
// !!! FIXME: don't push Uniforms/Samplers if they haven't changed.
927
928
// push Uniforms to the program from our register files...
929
count = ctx->bound_program->uniform_count;
930
for (i = 0; i < count; i++)
931
{
932
const UniformMap *map = &ctx->bound_program->uniforms[i];
933
934
935
936
const MOJOSHADER_uniform *u = map->uniform;
const MOJOSHADER_uniformType type = u->type;
const MOJOSHADER_shaderType shader_type = map->shader_type;
const int index = u->index;
937
const int size = u->array_count;
938
939
const GLint location = map->location;
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// only use arrays for 'c' registers.
assert((size == 0) || (type == MOJOSHADER_UNIFORM_FLOAT));
if (size != 0) // !!! FIXME: this code sucks.
{
// !!! FIXME: calculate this all at link time.
if (shader_type == MOJOSHADER_TYPE_VERTEX)
{
const MOJOSHADER_constant *c = ctx->bound_program->vertex->parseData->constants;
int hi = ctx->bound_program->vertex->parseData->constant_count;
int j;
GLfloat *ptr = ctx->bound_program->constants;
for (j = 0; j < hi; j++)
{
if (c[j].type != MOJOSHADER_UNIFORM_FLOAT)
continue;
const int idx = c[j].index;
if ( (idx >= index) && (idx < (index + size)) )
{
memcpy(ptr, &ctx->vs_reg_file_f[idx * 4], 16); // !!! FIXME: 16
memcpy(&ctx->vs_reg_file_f[idx * 4], &c->value.f, 16); // !!! FIXME: 16
ptr += 4;
} // if
} // for
ctx->glUniform4fv(location, size, &ctx->vs_reg_file_f[index * 4]);
ptr = ctx->bound_program->constants;
for (j = 0; j < hi; j++)
{
if (c[j].type != MOJOSHADER_UNIFORM_FLOAT)
continue;
const int idx = c[j].index;
if ( (idx >= index) && (idx < (index + size)) )
{
memcpy(&ctx->vs_reg_file_f[idx * 4], ptr, 16); // !!! FIXME: 16
ptr += 4;
} // if
} // for
} // if
else if (shader_type == MOJOSHADER_TYPE_PIXEL)
{
const MOJOSHADER_constant *c = ctx->bound_program->fragment->parseData->constants;
int hi = ctx->bound_program->fragment->parseData->constant_count;
int j;
GLfloat *ptr = ctx->bound_program->constants;
for (j = 0; j < hi; j++)
{
if (c[j].type != MOJOSHADER_UNIFORM_FLOAT)
continue;
const int idx = c[j].index;
if ( (idx >= index) && (idx < (index + size)) )
{