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authorDave Airlie <[email protected]>2009-08-27 15:36:35 +1000
committerDave Airlie <airlied@itt42.(none)>2009-08-27 15:38:00 +1000
commit82ff3190de3cd6cf4a514bac00ae02597abfb963 (patch)
treef7a5a70b0b5eed43e6449f3436f9de35d7e48234 /src
parent09c73c74376ed6b12e343c89b4eac94285439860 (diff)
radeon: fix scissor calcs.
For non-FBOs we need to invert, for FBOs the scissors are non-inverted. no matter what we need to clamp them to the buffer sizes.
Diffstat (limited to 'src')
-rw-r--r--src/mesa/drivers/dri/radeon/radeon_common.c35
1 files changed, 20 insertions, 15 deletions
diff --git a/src/mesa/drivers/dri/radeon/radeon_common.c b/src/mesa/drivers/dri/radeon/radeon_common.c
index 0894372fad1..bed75f3d733 100644
--- a/src/mesa/drivers/dri/radeon/radeon_common.c
+++ b/src/mesa/drivers/dri/radeon/radeon_common.c
@@ -231,26 +231,31 @@ void radeonSetCliprects(radeonContextPtr radeon)
void radeonUpdateScissor( GLcontext *ctx )
{
radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
+ GLint x = ctx->Scissor.X, y = ctx->Scissor.Y;
+ GLsizei w = ctx->Scissor.Width, h = ctx->Scissor.Height;
+ int x1, y1, x2, y2;
- if ( !ctx->DrawBuffer->Name ) {
- __DRIdrawablePrivate *dPriv = radeon_get_drawable(rmesa);
-
- int x = ctx->Scissor.X;
- int y = dPriv->h - ctx->Scissor.Y - ctx->Scissor.Height;
- int w = ctx->Scissor.X + ctx->Scissor.Width - 1;
- int h = dPriv->h - ctx->Scissor.Y - 1;
+ if (!ctx->DrawBuffer)
+ return;
- rmesa->state.scissor.rect.x1 = x + dPriv->x;
- rmesa->state.scissor.rect.y1 = y + dPriv->y;
- rmesa->state.scissor.rect.x2 = w + dPriv->x + 1;
- rmesa->state.scissor.rect.y2 = h + dPriv->y + 1;
+ if ( !ctx->DrawBuffer->Name ) {
+ x1 = x;
+ y1 = ctx->DrawBuffer->Height - (y + h);
+ x2 = x + w - 1;
+ y2 = y1 + h - 1;
} else {
- rmesa->state.scissor.rect.x1 = ctx->Scissor.X;
- rmesa->state.scissor.rect.y1 = ctx->Scissor.Y;
- rmesa->state.scissor.rect.x2 = ctx->Scissor.X + ctx->Scissor.Width;
- rmesa->state.scissor.rect.y2 = ctx->Scissor.Y + ctx->Scissor.Height;
+ x1 = x;
+ y1 = y;
+ x2 = x + w - 1;
+ y2 = y + h - 1;
+
}
+ rmesa->state.scissor.rect.x1 = CLAMP(x1, 0, ctx->DrawBuffer->Width - 1);
+ rmesa->state.scissor.rect.y1 = CLAMP(y1, 0, ctx->DrawBuffer->Height - 1);
+ rmesa->state.scissor.rect.x2 = CLAMP(x2, 0, ctx->DrawBuffer->Width - 1);
+ rmesa->state.scissor.rect.y2 = CLAMP(y2, 0, ctx->DrawBuffer->Height - 1);
+
radeonRecalcScissorRects( rmesa );
}