diff options
| -rw-r--r-- | src/gallium/auxiliary/util/u_gen_mipmap.c | 71 |
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 028b180a777..5824843069f 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); |