mesa: add MESA_GLSL debug flag to dump shaders on compile error

Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>

2 files changed, 15 insertions, 5 deletions

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index aba7d845b88..4042e9a7066 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2402,6 +2402,7 @@ struct gl_shader_program
 #define GLSL_NOP_FRAG 0x40  /**< Force no-op fragment shaders */
 #define GLSL_USE_PROG 0x80  /**< Log glUseProgram calls */
 #define GLSL_REPORT_ERRORS 0x100  /**< Print compilation errors */
+#define GLSL_DUMP_ON_ERROR 0x200 /**< Dump shaders to stderr on compile error */
 
 
 /**
diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index 4cc0357b1a4..c349b0cb5bc 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -71,7 +71,9 @@ get_shader_flags(void)
    const char *env = _mesa_getenv("MESA_GLSL");
 
    if (env) {
-      if (strstr(env, "dump"))
+      if (strstr(env, "dump_on_error"))
+         flags |= GLSL_DUMP_ON_ERROR;
+      else if (strstr(env, "dump"))
          flags |= GLSL_DUMP;
       if (strstr(env, "log"))
          flags |= GLSL_LOG;
@@ -783,10 +785,17 @@ compile_shader(struct gl_context *ctx, GLuint shaderObj)
 
    }
 
-   if (sh->CompileStatus == GL_FALSE && 
-       (ctx->Shader.Flags & GLSL_REPORT_ERRORS)) {
-      _mesa_debug(ctx, "Error compiling shader %u:\n%s\n",
-                  sh->Name, sh->InfoLog);
+   if (!sh->CompileStatus) {
+      if (ctx->Shader.Flags & GLSL_DUMP_ON_ERROR) {
+         fprintf(stderr, "GLSL source for %s shader %d:\n",
+                 _mesa_glsl_shader_target_name(sh->Type), sh->Name);
+         fprintf(stderr, "%s\n", sh->Source);
+      }
+
+      if (ctx->Shader.Flags & GLSL_REPORT_ERRORS) {
+         _mesa_debug(ctx, "Error compiling shader %u:\n%s\n",
+                     sh->Name, sh->InfoLog);
+      }
    }
 }