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r300: fix viewport inversion for FBOs

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This commit is contained in:
Dave Airlie 2009-03-21 22:27:01 +11:00
parent 8ab7c77dc2
commit 712478cfdd
1 changed files with 12 additions and 2 deletions
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14
src/mesa/drivers/dri/r300/r300_state.c
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@ -933,11 +933,21 @@ static void r300UpdateWindow(GLcontext * ctx)
GLfloat xoffset = dPriv ? (GLfloat) dPriv->x : 0;
GLfloat yoffset = dPriv ? (GLfloat) dPriv->y + dPriv->h : 0;
const GLfloat *v = ctx->Viewport._WindowMap.m;
const GLboolean render_to_fbo = (ctx->DrawBuffer ? (ctx->DrawBuffer->Name != 0) : 0);
GLfloat y_scale, y_bias;
if (render_to_fbo) {
y_scale = 1.0;
y_bias = 0;
} else {
y_scale = -1.0;
y_bias = yoffset;
}
GLfloat sx = v[MAT_SX];
GLfloat tx = v[MAT_TX] + xoffset + SUBPIXEL_X;
GLfloat sy = -v[MAT_SY];
GLfloat ty = (-v[MAT_TY]) + yoffset + SUBPIXEL_Y;
GLfloat sy = v[MAT_SY] * y_scale;
GLfloat ty = (v[MAT_TY] * y_scale) + y_bias + SUBPIXEL_Y;
GLfloat sz = v[MAT_SZ] * rmesa->radeon.state.depth.scale;
GLfloat tz = v[MAT_TZ] * rmesa->radeon.state.depth.scale;