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glsl: make shader substitution a little better

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This commit is contained in:
Brian Paul 2009-10-29 08:28:52 -06:00
parent 41892e9b17
commit c89f5b6ac8
1 changed files with 16 additions and 3 deletions
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19
src/mesa/main/shaders.c
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@ -26,6 +26,12 @@
#include "glheader.h"
#include "context.h"
#include "shaders.h"
#include "shader/shader_api.h"
/** Define this to enable shader substitution (see below) */
#define SHADER_SUBST 0
/**
@ -404,7 +410,6 @@ _mesa_read_shader(const char *fname)
}
/**
* Called via glShaderSource() and glShaderSourceARB() API functions.
* Basically, concatenate the source code strings into one long string
@ -418,6 +423,7 @@ _mesa_ShaderSourceARB(GLhandleARB shaderObj, GLsizei count,
GLint *offsets;
GLsizei i, totalLength;
GLcharARB *source;
GLuint checksum;
if (!shaderObj || string == NULL) {
_mesa_error(ctx, GL_INVALID_VALUE, "glShaderSourceARB");
@ -469,15 +475,16 @@ _mesa_ShaderSourceARB(GLhandleARB shaderObj, GLsizei count,
source[totalLength - 1] = '\0';
source[totalLength - 2] = '\0';
if (0) {
if (SHADER_SUBST) {
/* Compute the shader's source code checksum then try to open a file
* named newshader_<CHECKSUM>. If it exists, use it in place of the
* original shader source code. For debugging.
*/
const GLuint checksum = _mesa_str_checksum(source);
char filename[100];
GLcharARB *newSource;
checksum = _mesa_str_checksum(source);
sprintf(filename, "newshader_%d", checksum);
newSource = _mesa_read_shader(filename);
@ -491,6 +498,12 @@ _mesa_ShaderSourceARB(GLhandleARB shaderObj, GLsizei count,
ctx->Driver.ShaderSource(ctx, shaderObj, source);
if (SHADER_SUBST) {
struct gl_shader *sh = _mesa_lookup_shader(ctx, shaderObj);
if (sh)
sh->SourceChecksum = checksum; /* save original checksum */
}
_mesa_free(offsets);
}