| /* |
| * Copyright 2015 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, sublicense, |
| * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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. |
| */ |
| |
| #include "main/mtypes.h" |
| #include "main/buffers.h" |
| #include "main/errors.h" |
| #include "main/fbobject.h" |
| #include "main/get.h" |
| #include "main/teximage.h" |
| #include "main/texparam.h" |
| #include "st_copytex.h" |
| |
| |
| /** |
| * Copy a colorbuffer from the window system framebuffer (a window or |
| * pbuffer) to a texture. |
| * This is a helper used by the wglBindTexImageARB() function. |
| * |
| * \param srcBuffer source buffer (GL_FRONT_LEFT, GL_BACK_LEFT, etc) |
| * \param fbWidth width of the source framebuffer |
| * \param fbHeight height of the source framebuffer |
| * \param texTarget which texture target to copy to (GL_TEXTURE_1D/2D/CUBE_MAP) |
| * \param texLevel which texture mipmap level to copy to |
| * \param cubeFace which cube face to copy to (in [0,5]) |
| * \param texFormat what texture format to use, if texture doesn't exist |
| */ |
| void |
| st_copy_framebuffer_to_texture(GLenum srcBuffer, |
| GLint fbWidth, GLint fbHeight, |
| GLenum texTarget, GLint texLevel, |
| GLuint cubeFace, GLenum texFormat) |
| { |
| GLint readFBOSave, readBufSave, width, height; |
| |
| assert(cubeFace < 6); |
| |
| /* Save current FBO / readbuffer */ |
| _mesa_GetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &readFBOSave); |
| _mesa_GetIntegerv(GL_READ_BUFFER, &readBufSave); |
| |
| /* Read from the winsys buffer */ |
| _mesa_BindFramebuffer(GL_READ_FRAMEBUFFER, 0); |
| _mesa_ReadBuffer(srcBuffer); |
| |
| /* copy image from pbuffer to texture */ |
| switch (texTarget) { |
| case GL_TEXTURE_1D: |
| _mesa_GetTexLevelParameteriv(GL_TEXTURE_1D, texLevel, |
| GL_TEXTURE_WIDTH, &width); |
| if (width == fbWidth) { |
| /* replace existing texture */ |
| _mesa_CopyTexSubImage1D(GL_TEXTURE_1D, |
| texLevel, |
| 0, /* xoffset */ |
| 0, 0, /* x, y */ |
| fbWidth); |
| } else { |
| /* define initial texture */ |
| _mesa_CopyTexImage1D(GL_TEXTURE_1D, |
| texLevel, |
| texFormat, |
| 0, 0, /* x, y */ |
| fbWidth, 0); |
| } |
| break; |
| case GL_TEXTURE_2D: |
| _mesa_GetTexLevelParameteriv(GL_TEXTURE_2D, texLevel, |
| GL_TEXTURE_WIDTH, &width); |
| _mesa_GetTexLevelParameteriv(GL_TEXTURE_2D, texLevel, |
| GL_TEXTURE_HEIGHT, &height); |
| if (width == fbWidth && height == fbHeight) { |
| /* replace existing texture */ |
| _mesa_CopyTexSubImage2D(GL_TEXTURE_2D, |
| texLevel, |
| 0, 0, /* xoffset, yoffset */ |
| 0, 0, /* x, y */ |
| fbWidth, fbHeight); |
| } else { |
| /* define initial texture */ |
| _mesa_CopyTexImage2D(GL_TEXTURE_2D, |
| texLevel, |
| texFormat, |
| 0, 0, /* x, y */ |
| fbWidth, fbHeight, 0); |
| } |
| break; |
| case GL_TEXTURE_CUBE_MAP: |
| { |
| const GLenum target = |
| GL_TEXTURE_CUBE_MAP_POSITIVE_X + cubeFace; |
| _mesa_GetTexLevelParameteriv(target, texLevel, |
| GL_TEXTURE_WIDTH, &width); |
| _mesa_GetTexLevelParameteriv(target, texLevel, |
| GL_TEXTURE_HEIGHT, &height); |
| if (width == fbWidth && height == fbHeight) { |
| /* replace existing texture */ |
| _mesa_CopyTexSubImage2D(target, |
| texLevel, |
| 0, 0, /* xoffset, yoffset */ |
| 0, 0, /* x, y */ |
| fbWidth, fbHeight); |
| } else { |
| /* define new texture */ |
| _mesa_CopyTexImage2D(target, |
| texLevel, |
| texFormat, |
| 0, 0, /* x, y */ |
| fbWidth, fbHeight, 0); |
| } |
| } |
| break; |
| default: |
| _mesa_problem(NULL, |
| "unexpected target in st_copy_framebuffer_to_texture()\n"); |
| } |
| |
| /* restore readbuffer */ |
| _mesa_ReadBuffer(readBufSave); |
| _mesa_BindFramebuffer(GL_READ_FRAMEBUFFER, readFBOSave); |
| } |