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some improvements to _swrast_clear_depth_buffer()

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This commit is contained in:
Brian Paul 2005-09-20 04:36:50 +00:00
parent 000abaa12d
commit f39569f550
1 changed files with 14 additions and 17 deletions
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31
src/mesa/swrast/s_depth.c
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@ -1296,8 +1296,9 @@ _swrast_clear_depth_buffer( GLcontext *ctx, struct gl_renderbuffer *rb )
* memory, or perhaps the driver mmap'd the zbuffer memory.
*/
if (rb->DataType == GL_UNSIGNED_SHORT) {
if (width == rb->Width &&
(clearValue & 0xff) == ((clearValue >> 8) & 0xff)) {
if ((clearValue & 0xff) == ((clearValue >> 8) & 0xff) &&
((GLushort *) rb->GetPointer(ctx, rb, 0, 0) + width ==
(GLushort *) rb->GetPointer(ctx, rb, 0, 1))) {
/* optimized case */
GLushort *dst = (GLushort *) rb->GetPointer(ctx, rb, x, y);
GLuint len = width * height * sizeof(GLushort);
@ -1328,25 +1329,21 @@ _swrast_clear_depth_buffer( GLcontext *ctx, struct gl_renderbuffer *rb )
else {
/* Direct access not possible. Use PutRow to write new values. */
if (rb->DataType == GL_UNSIGNED_SHORT) {
GLushort clearRow[MAX_WIDTH];
GLint i, j;
for (j = 0; j < width; j++) {
clearRow[j] = clearValue;
}
GLushort clearVal16 = (GLushort) (clearValue & 0xffff);
GLint i;
for (i = 0; i < height; i++) {
rb->PutRow(ctx, rb, width, x, y + i, clearRow, NULL);
rb->PutMonoRow(ctx, rb, width, x, y + i, &clearVal16, NULL);
}
}
else if (rb->DataType == GL_UNSIGNED_INT) {
GLint i;
ASSERT(sizeof(clearValue) == sizeof(GLuint));
for (i = 0; i < height; i++) {
rb->PutMonoRow(ctx, rb, width, x, y + i, &clearValue, NULL);
}
}
else {
GLuint clearRow[MAX_WIDTH];
GLint i, j;
assert(rb->DataType == GL_UNSIGNED_INT);
for (j = 0; j < width; j++) {
clearRow[j] = clearValue;
}
for (i = 0; i < height; i++) {
rb->PutRow(ctx, rb, width, x, y + i, clearRow, NULL);
}
_mesa_problem(ctx, "bad depth renderbuffer DataType");
}
}
}