st/mesa: add new st_copy_framebuffer_to_texture() function
This helper is used by the WGL state tracker to implement the wglBindTexImageARB() function. This is basically a new "meta" function. However, we're not putting it in the src/mesa/drivers/common/ directory because that code is not linked with gallium-based drivers. Reviewed-by: José Fonseca <jfonseca@vmware.com> Reviewed-by: Charmaine Lee <charmainel@vmware.com>
This commit is contained in:
Brian Paul
parent
d6d90750f1
commit
47b9ef872b
|
|
@ -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 \
|
||||
|
|
|
|||
|
|
@ -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);
|
||||
}
|
||||
|
|
@ -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 */
|
||||
Loading…
Reference in New Issue