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Diffstat (limited to 'src/gallium/auxiliary/util/u_gen_mipmap.c')
-rw-r--r--src/gallium/auxiliary/util/u_gen_mipmap.c96
1 files changed, 86 insertions, 10 deletions
diff --git a/src/gallium/auxiliary/util/u_gen_mipmap.c b/src/gallium/auxiliary/util/u_gen_mipmap.c
index 690412ae7d..6fa13a8ce1 100644
--- a/src/gallium/auxiliary/util/u_gen_mipmap.c
+++ b/src/gallium/auxiliary/util/u_gen_mipmap.c
@@ -1316,7 +1316,6 @@ util_create_gen_mipmap(struct pipe_context *pipe,
for (i = 0; i < 4; i++) {
ctx->vertices[i][0][2] = 0.0f; /* z */
ctx->vertices[i][0][3] = 1.0f; /* w */
- ctx->vertices[i][1][2] = 0.0f; /* r */
ctx->vertices[i][1][3] = 1.0f; /* q */
}
@@ -1350,29 +1349,104 @@ get_next_slot(struct gen_mipmap_state *ctx)
static unsigned
-set_vertex_data(struct gen_mipmap_state *ctx, float width, float height)
+set_vertex_data(struct gen_mipmap_state *ctx,
+ enum pipe_texture_target tex_target,
+ uint face, float width, float height)
{
unsigned offset;
+ /* vert[0].position */
ctx->vertices[0][0][0] = 0.0f; /*x*/
ctx->vertices[0][0][1] = 0.0f; /*y*/
- ctx->vertices[0][1][0] = 0.0f; /*s*/
- ctx->vertices[0][1][1] = 0.0f; /*t*/
+ /* vert[1].position */
ctx->vertices[1][0][0] = width;
ctx->vertices[1][0][1] = 0.0f;
- ctx->vertices[1][1][0] = 1.0f;
- ctx->vertices[1][1][1] = 0.0f;
+ /* vert[2].position */
ctx->vertices[2][0][0] = width;
ctx->vertices[2][0][1] = height;
- ctx->vertices[2][1][0] = 1.0f;
- ctx->vertices[2][1][1] = 1.0f;
+ /* vert[3].position */
ctx->vertices[3][0][0] = 0.0f;
ctx->vertices[3][0][1] = height;
- ctx->vertices[3][1][0] = 0.0f;
- ctx->vertices[3][1][1] = 1.0f;
+
+ /* Setup vertex texcoords. This is a little tricky for cube maps. */
+ if (tex_target == PIPE_TEXTURE_CUBE) {
+ static const float st[4][2] = {
+ {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f}
+ };
+ float rx, ry, rz;
+ uint i;
+
+ /* loop over quad verts */
+ for (i = 0; i < 4; i++) {
+ /* Compute sc = +/-scale and tc = +/-scale.
+ * Not +/-1 to avoid cube face selection ambiguity near the edges,
+ * though that can still sometimes happen with this scale factor...
+ */
+ const float scale = 0.9999;
+ const float sc = (2.0f * st[i][0] - 1.0f) * scale;
+ const float tc = (2.0f * st[i][1] - 1.0f) * scale;
+
+ switch (face) {
+ case PIPE_TEX_FACE_POS_X:
+ rx = 1.0f;
+ ry = -tc;
+ rz = -sc;
+ break;
+ case PIPE_TEX_FACE_NEG_X:
+ rx = -1.0f;
+ ry = -tc;
+ rz = sc;
+ break;
+ case PIPE_TEX_FACE_POS_Y:
+ rx = sc;
+ ry = 1.0f;
+ rz = tc;
+ break;
+ case PIPE_TEX_FACE_NEG_Y:
+ rx = sc;
+ ry = -1.0f;
+ rz = -tc;
+ break;
+ case PIPE_TEX_FACE_POS_Z:
+ rx = sc;
+ ry = -tc;
+ rz = 1.0f;
+ break;
+ case PIPE_TEX_FACE_NEG_Z:
+ rx = -sc;
+ ry = -tc;
+ rz = -1.0f;
+ break;
+ default:
+ assert(0);
+ }
+
+ ctx->vertices[i][1][0] = rx; /*s*/
+ ctx->vertices[i][1][1] = ry; /*t*/
+ ctx->vertices[i][1][2] = rz; /*r*/
+ }
+ }
+ else {
+ /* 1D/2D */
+ ctx->vertices[0][1][0] = 0.0f; /*s*/
+ ctx->vertices[0][1][1] = 0.0f; /*t*/
+ ctx->vertices[0][1][2] = 0.0f; /*r*/
+
+ ctx->vertices[1][1][0] = 1.0f;
+ ctx->vertices[1][1][1] = 0.0f;
+ ctx->vertices[1][1][2] = 0.0f;
+
+ ctx->vertices[2][1][0] = 1.0f;
+ ctx->vertices[2][1][1] = 1.0f;
+ ctx->vertices[2][1][2] = 0.0f;
+
+ ctx->vertices[3][1][0] = 0.0f;
+ ctx->vertices[3][1][1] = 1.0f;
+ ctx->vertices[3][1][2] = 0.0f;
+ }
offset = get_next_slot( ctx );
@@ -1503,6 +1577,8 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
/* quad coords in window coords (bypassing vs, clip and viewport) */
offset = set_vertex_data(ctx,
+ pt->target,
+ face,
(float) pt->width[dstLevel],
(float) pt->height[dstLevel]);