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mesa: added buffer object debug code (disabled)

This commit is contained in:
Brian Paul 2009-06-03 15:38:57 -06:00
parent 4f4280b435
commit e7927626c1
1 changed files with 36 additions and 0 deletions
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36
src/mesa/main/bufferobj.c
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@ -1014,6 +1014,11 @@ _mesa_BufferDataARB(GLenum target, GLsizeiptrARB size,
bufObj->Written = GL_TRUE;
#ifdef VBO_DEBUG
_mesa_printf("glBufferDataARB(%u, sz %ld, from %p, usage 0x%x)\n",
bufObj->Name, size, data, usage);
#endif
/* Give the buffer object to the driver! <data> may be null! */
ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj );
}
@ -1103,6 +1108,17 @@ _mesa_MapBufferARB(GLenum target, GLenum access)
if (access == GL_WRITE_ONLY_ARB || access == GL_READ_WRITE_ARB)
bufObj->Written = GL_TRUE;
#ifdef VBO_DEBUG
_mesa_printf("glMapBufferARB(%u, sz %ld, access 0x%x)\n",
bufObj->Name, bufObj->Size, access);
if (access == GL_WRITE_ONLY_ARB) {
GLuint i;
GLubyte *b = (GLubyte *) bufObj->Pointer;
for (i = 0; i < bufObj->Size; i++)
b[i] = i & 0xff;
}
#endif
return bufObj->Pointer;
}
@ -1129,6 +1145,26 @@ _mesa_UnmapBufferARB(GLenum target)
return GL_FALSE;
}
#ifdef VBO_DEBUG
if (bufObj->Access == GL_WRITE_ONLY_ARB) {
GLuint i, unchanged = 0;
GLubyte *b = (GLubyte *) bufObj->Pointer;
GLint pos = -1;
/* check which bytes changed */
for (i = 0; i < bufObj->Size - 1; i++) {
if (b[i] == (i & 0xff) && b[i+1] == ((i+1) & 0xff)) {
unchanged++;
if (pos == -1)
pos = i;
}
}
if (unchanged) {
_mesa_printf("glUnmapBufferARB(%u): %u of %ld unchanged, starting at %d\n",
bufObj->Name, unchanged, bufObj->Size, pos);
}
}
#endif
status = ctx->Driver.UnmapBuffer( ctx, target, bufObj );
bufObj->Access = DEFAULT_ACCESS;
bufObj->Pointer = NULL;