[Mesa-dev] [wip 9/9] mesa: OES_get_program_binary extension functionality

[Tapani Pälli]

Signed-off-by: Tapani Pälli <tapani.palli at intel.com>
---
 src/mesa/main/shaderapi.c | 44 ++++++++++++++++++++++++++++++++++++++------
 1 file changed, 38 insertions(+), 6 deletions(-)

diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index 57511e8..c07b226 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -57,6 +57,7 @@
 #include "../glsl/ir.h"
 #include "../glsl/ir_uniform.h"
 #include "../glsl/program.h"
+#include "../glsl/shader_cache.h"
 
 /** Define this to enable shader substitution (see below) */
 #define SHADER_SUBST 0
@@ -1632,8 +1633,26 @@ _mesa_GetProgramBinary(GLuint program, GLsizei bufSize, GLsizei *length,
    if (length != NULL)
       *length = 0;
 
-   (void) binaryFormat;
-   (void) binary;
+   size_t size = 0;
+   char *data = mesa_program_serialize(shProg, &size);
+
+   /* we have more data that can fit to user given buffer */
+   if (size > bufSize) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, __FUNCTION__);
+      if (data)
+         free(data);
+      return;
+   }
+
+   if (data) {
+      memcpy(binary, data, size);
+      free(data);
+   }
+
+   if (length != NULL)
+      *length = size;
+
+   *binaryFormat = 0;
 }
 
 void GLAPIENTRY
@@ -1647,10 +1666,23 @@ _mesa_ProgramBinary(GLuint program, GLenum binaryFormat,
    if (!shProg)
       return;
 
-   (void) binaryFormat;
-   (void) binary;
-   (void) length;
-   _mesa_error(ctx, GL_INVALID_OPERATION, __FUNCTION__);
+   if (length <= 0)
+      return;
+
+   /* free possible existing data and initialize structure */
+   _mesa_free_shader_program_data(ctx, shProg);
+   _mesa_init_shader_program(ctx, shProg);
+
+   /* fill structure from a binary blob */
+   if (mesa_program_deserialize(shProg, binary, length)) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glProgramBinary(binary incompatible)");
+      return;
+   }
+
+   /* driver specific link, optimizations and what not */
+   ctx->Driver.LinkShader(ctx, shProg);
+
+   _mesa_ValidateProgram(program);
 }
 
 
-- 
1.8.3.1