- GLint curVBO = -1;
- GLint curVBO = GL_SUPPORT(ARB_VERTEX_BUFFER_OBJECT) ? -1 : 0;
Strange, I thought I sent a patch like that already and it was committed :-/
Stefan Dösinger wrote:
- GLint curVBO = -1;
- GLint curVBO = GL_SUPPORT(ARB_VERTEX_BUFFER_OBJECT) ? -1 : 0;
Strange, I thought I sent a patch like that already and it was committed :-/
You wrote it for loadNumberedArrays, I copy pasted it to loadVertexData. I have to admit, I don't know exactly what I'm doing here (opengl/d3d newbie). But this patch lets me play Battlefield 1942 on my laptop where ARB_VERTEX_BUFFER_OBJECT is not supported :-)
Am Samstag 28 Oktober 2006 13:31 schrieb Markus Amsler:
Stefan Dösinger wrote:
- GLint curVBO = -1;
- GLint curVBO = GL_SUPPORT(ARB_VERTEX_BUFFER_OBJECT) ? -1 : 0;
Strange, I thought I sent a patch like that already and it was committed :-/
You wrote it for loadNumberedArrays, I copy pasted it to loadVertexData. I have to admit, I don't know exactly what I'm doing here (opengl/d3d newbie).
The code below checks if the VBO for the data type in the stream is the vbo that is currently bound. 0 means no vbo, so setting the vbo to 0 equals operation without vbos. There is no member checking the current vbo in the device, only the curvbo optimization in the loading functions(waits for better state management).
If vbos are not supported the vbo for each data in the stream source is always 0. Setting curvbo to 0 if vbos aren't supported will make sure that the .vbo != curvbo check is always false and glBindBufferARB is never called, preventing the crash due to a NULL or invalid function pointer.
But this patch lets me play Battlefield 1942 on my laptop where ARB_VERTEX_BUFFER_OBJECT is not supported :-)
Could it be that you have some radeon dri setup without direct rendering(using accelerated indirect rendering instead)? I think even a gf2 and a mach64 card support vertex buffers objects, so I'm kinda surprised yours does not.
Though, I also wonder why accelerated indirect rendering won't do VBOs.
Stefan Dösinger wrote:
Am Samstag 28 Oktober 2006 13:31 schrieb Markus Amsler:
Stefan Dösinger wrote:
- GLint curVBO = -1;
- GLint curVBO = GL_SUPPORT(ARB_VERTEX_BUFFER_OBJECT) ? -1 : 0;
Strange, I thought I sent a patch like that already and it was committed :-/
You wrote it for loadNumberedArrays, I copy pasted it to loadVertexData. I have to admit, I don't know exactly what I'm doing here (opengl/d3d newbie).
The code below checks if the VBO for the data type in the stream is the vbo that is currently bound. 0 means no vbo, so setting the vbo to 0 equals operation without vbos. There is no member checking the current vbo in the device, only the curvbo optimization in the loading functions(waits for better state management).
If vbos are not supported the vbo for each data in the stream source is always 0. Setting curvbo to 0 if vbos aren't supported will make sure that the .vbo != curvbo check is always false and glBindBufferARB is never called, preventing the crash due to a NULL or invalid function pointer.
Thanks, so the patch is correct after all.
But this patch lets me play Battlefield 1942 on my laptop where ARB_VERTEX_BUFFER_OBJECT is not supported :-)
Could it be that you have some radeon dri setup without direct rendering(using accelerated indirect rendering instead)? I think even a gf2 and a mach64 card support vertex buffers objects, so I'm kinda surprised yours does not.
Though, I also wonder why accelerated indirect rendering won't do VBOs.
Its a Radeon Mobility M7 LW, with direct rendering. It has a RV200 core which is a R100 with the memory controller from R200. And it looks like the R100 doesn't support vertex_buffer_objects (couldn't find precise specs).
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Markus Amsler -
Stefan Dösinger