diff options
Diffstat (limited to 'src/gallium/auxiliary/util/u_blit.c')
| -rw-r--r-- | src/gallium/auxiliary/util/u_blit.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_blit.c b/src/gallium/auxiliary/util/u_blit.c index 7b9415d49a..6555dcd588 100644 --- a/src/gallium/auxiliary/util/u_blit.c +++ b/src/gallium/auxiliary/util/u_blit.c @@ -223,6 +223,49 @@ setup_vertex_data(struct blit_state *ctx, /** + * Setup vertex data for the textured quad we'll draw. + * Note: y=0=top + */ +static void +setup_vertex_data_tex(struct blit_state *ctx, + float x0, float y0, float x1, float y1, + float s0, float t0, float s1, float t1, + float z) +{ + void *buf; + + ctx->vertices[0][0][0] = x0; + ctx->vertices[0][0][1] = y0; + ctx->vertices[0][0][2] = z; + ctx->vertices[0][1][0] = s0; /*s*/ + ctx->vertices[0][1][1] = t0; /*t*/ + + ctx->vertices[1][0][0] = x1; + ctx->vertices[1][0][1] = y0; + ctx->vertices[1][0][2] = z; + ctx->vertices[1][1][0] = s1; /*s*/ + ctx->vertices[1][1][1] = t0; /*t*/ + + ctx->vertices[2][0][0] = x1; + ctx->vertices[2][0][1] = y1; + ctx->vertices[2][0][2] = z; + ctx->vertices[2][1][0] = s1; + ctx->vertices[2][1][1] = t1; + + ctx->vertices[3][0][0] = x0; + ctx->vertices[3][0][1] = y1; + ctx->vertices[3][0][2] = z; + ctx->vertices[3][1][0] = s0; + ctx->vertices[3][1][1] = t1; + + 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); +} +/** * Copy pixel block from src surface to dst surface. * Overlapping regions are acceptable. * XXX need some control over blitting Z and/or stencil. @@ -362,3 +405,99 @@ 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; + float s0, t0, s1, t1; + + assert(filter == PIPE_TEX_MIPFILTER_NEAREST || + filter == PIPE_TEX_MIPFILTER_LINEAR); + + assert(tex->width[0] != 0); + assert(tex->height[0] != 0); + + s0 = srcX0 / (float)tex->width[0]; + s1 = srcX1 / (float)tex->width[0]; + t0 = srcY0 / (float)tex->height[0]; + t1 = srcY1 / (float)tex->height[0]; + + 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_tex(ctx, + (float) dstX0, (float) dstY0, + (float) dstX1, (float) dstY1, + s0, t0, s1, t1, + 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); +} |