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st/mesa: clamp glDrawPixels size to max texture size

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This commit is contained in:
Brian Paul 2012-06-19 09:39:54 -06:00
parent 7f4786ad29
commit fc855ed5d9
1 changed files with 31 additions and 0 deletions
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31
src/mesa/state_tracker/st_cb_drawpixels.c
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@ -1055,6 +1055,28 @@ get_depth_stencil_fp_variant(struct st_context *st, GLboolean write_depth,
}
/**
* Clamp glDrawPixels width and height to the maximum texture size.
*/
static void
clamp_size(struct pipe_context *pipe, GLsizei *width, GLsizei *height,
struct gl_pixelstore_attrib *unpack)
{
const unsigned maxSize =
1 << (pipe->screen->get_param(pipe->screen,
PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1);
if (*width > maxSize) {
if (unpack->RowLength == 0)
unpack->RowLength = *width;
*width = maxSize;
}
if (*height > maxSize) {
*height = maxSize;
}
}
/**
* Called via ctx->Driver.DrawPixels()
*/
@ -1072,12 +1094,21 @@ st_DrawPixels(struct gl_context *ctx, GLint x, GLint y,
struct pipe_sampler_view *sv[2];
int num_sampler_view = 1;
struct st_fp_variant *fpv;
struct gl_pixelstore_attrib clippedUnpack;
/* Mesa state should be up to date by now */
assert(ctx->NewState == 0x0);
st_validate_state(st);
/* Limit the size of the glDrawPixels to the max texture size.
* Strictly speaking, that's not correct but since we don't handle
* larger images yet, this is better than crashing.
*/
clippedUnpack = *unpack;
unpack = &clippedUnpack;
clamp_size(st->pipe, &width, &height, &clippedUnpack);
if (format == GL_DEPTH_STENCIL)
write_stencil = write_depth = GL_TRUE;
else if (format == GL_STENCIL_INDEX)