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authorJakob Bornecrantz <jakob@tungstengraphics.com>2008-06-23 16:01:41 +0200
committerJakob Bornecrantz <jakob@tungstengraphics.com>2008-06-23 16:09:38 +0200
commit708bb35194e16bf7aaf5cd676f572b7200a156d1 (patch)
treec01eb1995e35c790a2342a55458be5e5bd59e3b9
parent52501801c7107614387717e7b97e66a667f9e5b8 (diff)
util: Blit can now copy from texture to surface
-rw-r--r--src/gallium/auxiliary/util/u_blit.c101
-rw-r--r--src/gallium/auxiliary/util/u_blit.h14
2 files changed, 112 insertions, 3 deletions
diff --git a/src/gallium/auxiliary/util/u_blit.c b/src/gallium/auxiliary/util/u_blit.c
index 7b9415d49a..28513f54e6 100644
--- a/src/gallium/auxiliary/util/u_blit.c
+++ b/src/gallium/auxiliary/util/u_blit.c
@@ -362,3 +362,104 @@ util_blit_pixels(struct blit_state *ctx,
screen->texture_release(screen, &tex);
}
+/**
+ * Copy pixel block from src texture to dst surface.
+ * Overlapping regions are acceptable.
+ *
+ * XXX Should support selection of level.
+ * XXX need some control over blitting Z and/or stencil.
+ */
+void
+util_blit_pixels_tex(struct blit_state *ctx,
+ struct pipe_texture *tex,
+ int srcX0, int srcY0,
+ int srcX1, int srcY1,
+ struct pipe_surface *dst,
+ int dstX0, int dstY0,
+ int dstX1, int dstY1,
+ float z, uint filter)
+{
+ struct pipe_context *pipe = ctx->pipe;
+ struct pipe_screen *screen = pipe->screen;
+ struct pipe_framebuffer_state fb;
+ const int srcLeft = MIN2(srcX0, srcX1);
+ const int srcTop = MIN2(srcY0, srcY1);
+
+ assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
+ filter == PIPE_TEX_MIPFILTER_LINEAR);
+
+ if (srcLeft != srcX0) {
+ /* left-right flip */
+ int tmp = dstX0;
+ dstX0 = dstX1;
+ dstX1 = tmp;
+ }
+
+ if (srcTop != srcY0) {
+ /* up-down flip */
+ int tmp = dstY0;
+ dstY0 = dstY1;
+ dstY1 = tmp;
+ }
+
+ assert(screen->is_format_supported(screen, dst->format, PIPE_SURFACE));
+
+ /* save state (restored below) */
+ cso_save_blend(ctx->cso);
+ cso_save_depth_stencil_alpha(ctx->cso);
+ cso_save_rasterizer(ctx->cso);
+ cso_save_samplers(ctx->cso);
+ cso_save_sampler_textures(ctx->cso);
+ cso_save_framebuffer(ctx->cso);
+ cso_save_fragment_shader(ctx->cso);
+ cso_save_vertex_shader(ctx->cso);
+ cso_save_viewport(ctx->cso);
+
+ /* set misc state we care about */
+ cso_set_blend(ctx->cso, &ctx->blend);
+ cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
+ cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
+ cso_set_viewport(ctx->cso, &ctx->viewport);
+
+ /* sampler */
+ ctx->sampler.min_img_filter = filter;
+ ctx->sampler.mag_img_filter = filter;
+ cso_single_sampler(ctx->cso, 0, &ctx->sampler);
+ cso_single_sampler_done(ctx->cso);
+
+ /* texture */
+ cso_set_sampler_textures(ctx->cso, 1, &tex);
+
+ /* shaders */
+ cso_set_fragment_shader_handle(ctx->cso, ctx->fs);
+ cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
+
+ /* drawing dest */
+ memset(&fb, 0, sizeof(fb));
+ fb.width = dst->width;
+ fb.height = dst->height;
+ fb.num_cbufs = 1;
+ fb.cbufs[0] = dst;
+ cso_set_framebuffer(ctx->cso, &fb);
+
+ /* draw quad */
+ setup_vertex_data(ctx,
+ (float) dstX0, (float) dstY0,
+ (float) dstX1, (float) dstY1, z);
+
+ util_draw_vertex_buffer(ctx->pipe, ctx->vbuf,
+ PIPE_PRIM_TRIANGLE_FAN,
+ 4, /* verts */
+ 2); /* attribs/vert */
+
+ /* restore state we changed */
+ cso_restore_blend(ctx->cso);
+ cso_restore_depth_stencil_alpha(ctx->cso);
+ cso_restore_rasterizer(ctx->cso);
+ cso_restore_samplers(ctx->cso);
+ cso_restore_sampler_textures(ctx->cso);
+ cso_restore_framebuffer(ctx->cso);
+ cso_restore_fragment_shader(ctx->cso);
+ cso_restore_vertex_shader(ctx->cso);
+ cso_restore_viewport(ctx->cso);
+}
diff --git a/src/gallium/auxiliary/util/u_blit.h b/src/gallium/auxiliary/util/u_blit.h
index 0ce9732e62..7d0406c104 100644
--- a/src/gallium/auxiliary/util/u_blit.h
+++ b/src/gallium/auxiliary/util/u_blit.h
@@ -42,15 +42,13 @@ struct cso_context;
struct blit_state;
+
extern struct blit_state *
util_create_blit(struct pipe_context *pipe, struct cso_context *cso);
-
extern void
util_destroy_blit(struct blit_state *ctx);
-
-
extern void
util_blit_pixels(struct blit_state *ctx,
struct pipe_surface *src,
@@ -61,6 +59,16 @@ util_blit_pixels(struct blit_state *ctx,
int dstX1, int dstY1,
float z, uint filter);
+extern void
+util_blit_pixels_tex(struct blit_state *ctx,
+ struct pipe_texture *tex,
+ int srcX0, int srcY0,
+ int srcX1, int srcY1,
+ struct pipe_surface *dst,
+ int dstX0, int dstY0,
+ int dstX1, int dstY1,
+ float z, uint filter);
+
#ifdef __cplusplus
}