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-rw-r--r--src/gallium/auxiliary/util/u_gen_mipmap.c71
1 files changed, 65 insertions, 6 deletions
diff --git a/src/gallium/auxiliary/util/u_gen_mipmap.c b/src/gallium/auxiliary/util/u_gen_mipmap.c
index 028b180a77..5824843069 100644
--- a/src/gallium/auxiliary/util/u_gen_mipmap.c
+++ b/src/gallium/auxiliary/util/u_gen_mipmap.c
@@ -64,6 +64,9 @@ struct gen_mipmap_state
/*struct pipe_viewport_state viewport;*/
struct pipe_sampler_state *vs;
struct pipe_sampler_state *fs;
+
+ struct pipe_buffer *vbuf; /**< quad vertices */
+ float vertices[4][2][4]; /**< vertex/texcoords for quad */
};
@@ -683,6 +686,7 @@ util_create_gen_mipmap(struct pipe_context *pipe,
struct cso_context *cso)
{
struct gen_mipmap_state *ctx;
+ uint i;
ctx = CALLOC_STRUCT(gen_mipmap_state);
if (!ctx)
@@ -744,10 +748,62 @@ util_create_gen_mipmap(struct pipe_context *pipe,
/* fragment shader */
ctx->fs = util_make_fragment_tex_shader(pipe);
+ ctx->vbuf = pipe->winsys->buffer_create(pipe->winsys,
+ 32,
+ PIPE_BUFFER_USAGE_VERTEX,
+ 4 * 2 * 4 * sizeof(float));
+ if (!ctx->vbuf) {
+ FREE(ctx);
+ return NULL;
+ }
+
+ /* vertex data that doesn't change */
+ 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 */
+ }
+
return ctx;
}
+static void
+set_vertex_data(struct gen_mipmap_state *ctx, float width, float height)
+{
+ void *buf;
+
+ 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*/
+
+ ctx->vertices[1][0][0] = width; /*x*/
+ ctx->vertices[1][0][1] = 0.0f; /*y*/
+ ctx->vertices[1][1][0] = 1.0f; /*s*/
+ ctx->vertices[1][1][1] = 0.0f; /*t*/
+
+ 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;
+
+ 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;
+
+ buf = ctx->pipe->winsys->buffer_map(ctx->pipe->winsys, ctx->vbuf,
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+
+ memcpy(buf, ctx->vertices, sizeof(ctx->vertices));
+
+ ctx->pipe->winsys->buffer_unmap(ctx->pipe->winsys, ctx->vbuf);
+}
+
+
+
/**
* Destroy a mipmap generation context
*/
@@ -759,6 +815,8 @@ util_destroy_gen_mipmap(struct gen_mipmap_state *ctx)
pipe->delete_vs_state(pipe, ctx->vs);
pipe->delete_fs_state(pipe, ctx->fs);
+ pipe->winsys->buffer_destroy(pipe->winsys, ctx->vbuf);
+
FREE(ctx);
}
@@ -863,12 +921,13 @@ util_gen_mipmap(struct gen_mipmap_state *ctx,
pipe->set_sampler_textures(pipe, 1, &pt);
/* quad coords in window coords (bypassing clipping, viewport mapping) */
- util_draw_texquad(pipe,
- 0.0F, 0.0F, /* x0, y0 */
- (float) pt->width[dstLevel], /* x1 */
- (float) pt->height[dstLevel], /* y1 */
- 0.0F); /* z */
-
+ set_vertex_data(ctx,
+ (float) pt->width[dstLevel],
+ (float) pt->height[dstLevel]);
+ util_draw_vertex_buffer(ctx->pipe, ctx->vbuf,
+ PIPE_PRIM_TRIANGLE_FAN,
+ 4, /* verts */
+ 2); /* attribs/vert */
pipe->flush(pipe, PIPE_FLUSH_WAIT);