The cool part was that in the "fbo-depthstencil -drawpixels
GL_DEPTH24_STENCIL8 32F_24_8_REV" testcase, the shifting happened to
end up with a value awfully close to the expected value, except for
every other pixel being 0 (the stencil value, shifted away to
nothing).
---
src/mesa/swrast/s_drawpix.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/mesa/swrast/s_drawpix.c b/src/mesa/swrast/s_drawpix.c
index b6c4337..7259881 100644
--- a/src/mesa/swrast/s_drawpix.c
+++ b/src/mesa/swrast/s_drawpix.c
@@ -625,7 +625,8 @@ draw_depth_stencil_pixels(struct gl_context *ctx, GLint x,
GLint y,
GL_DEPTH_STENCIL_EXT, type, i, 0);
if (ctx->Depth.Mask) {
- if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 24) {
+ if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 24 &&
+ type == GL_UNSIGNED_INT_24_8) {
/* fast path 24-bit zbuffer */
GLuint zValues[MAX_WIDTH];
GLint j;
@@ -639,7 +640,8 @@ draw_depth_stencil_pixels(struct gl_context *ctx, GLint x,
GLint y,
else
depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
}
- else if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 16) {
+ else if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 16 &&
+ type == GL_UNSIGNED_INT_24_8) {
/* fast path 16-bit zbuffer */
GLushort zValues[MAX_WIDTH];
GLint j;
--
1.7.7.3
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