| /************************************************************************** |
| * |
| * Copyright 2009 VMware, Inc. All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /** |
| * @file |
| * Surface utility functions. |
| * |
| * @author Brian Paul |
| */ |
| |
| |
| #include "pipe/p_screen.h" |
| #include "pipe/p_state.h" |
| #include "pipe/p_defines.h" |
| |
| #include "util/u_surface.h" |
| |
| |
| /** |
| * Helper to quickly create an RGBA rendering surface of a certain size. |
| * \param textureOut returns the new texture |
| * \param surfaceOut returns the new surface |
| * \return TRUE for success, FALSE if failure |
| */ |
| boolean |
| util_create_rgba_surface(struct pipe_screen *screen, |
| uint width, uint height, |
| struct pipe_texture **textureOut, |
| struct pipe_surface **surfaceOut) |
| { |
| static const enum pipe_format rgbaFormats[] = { |
| PIPE_FORMAT_A8R8G8B8_UNORM, |
| PIPE_FORMAT_B8G8R8A8_UNORM, |
| PIPE_FORMAT_R8G8B8A8_UNORM, |
| PIPE_FORMAT_NONE |
| }; |
| const uint target = PIPE_TEXTURE_2D; |
| const uint usage = PIPE_TEXTURE_USAGE_RENDER_TARGET; |
| enum pipe_format format = PIPE_FORMAT_NONE; |
| struct pipe_texture templ; |
| uint i; |
| |
| /* Choose surface format */ |
| for (i = 0; rgbaFormats[i]; i++) { |
| if (screen->is_format_supported(screen, rgbaFormats[i], |
| target, usage, 0)) { |
| format = rgbaFormats[i]; |
| break; |
| } |
| } |
| if (format == PIPE_FORMAT_NONE) |
| return FALSE; /* unable to get an rgba format!?! */ |
| |
| /* create texture */ |
| memset(&templ, 0, sizeof(templ)); |
| templ.target = target; |
| templ.format = format; |
| templ.last_level = 0; |
| templ.width[0] = width; |
| templ.height[0] = height; |
| templ.depth[0] = 1; |
| pf_get_block(format, &templ.block); |
| templ.tex_usage = usage; |
| |
| *textureOut = screen->texture_create(screen, &templ); |
| if (!*textureOut) |
| return FALSE; |
| |
| /* create surface / view into texture */ |
| *surfaceOut = screen->get_tex_surface(screen, *textureOut, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE); |
| if (!*surfaceOut) { |
| pipe_texture_reference(textureOut, NULL); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| |
| /** |
| * Release the surface and texture from util_create_rgba_surface(). |
| */ |
| void |
| util_destroy_rgba_surface(struct pipe_texture *texture, |
| struct pipe_surface *surface) |
| { |
| pipe_surface_reference(&surface, NULL); |
| pipe_texture_reference(&texture, NULL); |
| } |
| |