diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/Makefile.sources | 2 | ||||
| -rw-r--r-- | src/mesa/state_tracker/st_copytex.c | 140 | ||||
| -rw-r--r-- | src/mesa/state_tracker/st_copytex.h | 36 |
3 files changed, 178 insertions, 0 deletions
diff --git a/src/mesa/Makefile.sources b/src/mesa/Makefile.sources index 778b92d9892..13a05f53b22 100644 --- a/src/mesa/Makefile.sources +++ b/src/mesa/Makefile.sources @@ -465,6 +465,8 @@ STATETRACKER_FILES = \ state_tracker/st_cb_xformfb.h \ state_tracker/st_context.c \ state_tracker/st_context.h \ + state_tracker/st_copytex.c \ + state_tracker/st_copytex.h \ state_tracker/st_debug.c \ state_tracker/st_debug.h \ state_tracker/st_draw.c \ diff --git a/src/mesa/state_tracker/st_copytex.c b/src/mesa/state_tracker/st_copytex.c new file mode 100644 index 00000000000..d246d8b6a71 --- /dev/null +++ b/src/mesa/state_tracker/st_copytex.c @@ -0,0 +1,140 @@ +/* + * 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_BUFFER, 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_BUFFER, readFBOSave); +} diff --git a/src/mesa/state_tracker/st_copytex.h b/src/mesa/state_tracker/st_copytex.h new file mode 100644 index 00000000000..451bd2edca5 --- /dev/null +++ b/src/mesa/state_tracker/st_copytex.h @@ -0,0 +1,36 @@ +/* + * 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. + */ + +#ifndef ST_COPYTEX_H +#define ST_COPYTEX_H + +#include "main/glheader.h" + +extern void +st_copy_framebuffer_to_texture(GLenum srcBuffer, + GLint fbWidth, GLint fbHeight, + GLenum texTarget, GLint texLevel, + GLuint cubeFace, GLenum texFormat); + + +#endif /* ST_COPYTEX_H */ |