diff options
| -rw-r--r-- | src/mesa/drivers/common/driverfuncs.c | 2 | ||||
| -rw-r--r-- | src/mesa/sources.mak | 1 | ||||
| -rw-r--r-- | src/mesa/swrast/s_texture.c | 109 | ||||
| -rw-r--r-- | src/mesa/swrast/swrast.h | 14 |
4 files changed, 126 insertions, 0 deletions
diff --git a/src/mesa/drivers/common/driverfuncs.c b/src/mesa/drivers/common/driverfuncs.c index 912231b1d37..78caa054203 100644 --- a/src/mesa/drivers/common/driverfuncs.c +++ b/src/mesa/drivers/common/driverfuncs.c @@ -112,6 +112,8 @@ _mesa_init_driver_functions(struct dd_function_table *driver) driver->DeleteTexture = _mesa_delete_texture_object; driver->NewTextureImage = _mesa_new_texture_image; driver->FreeTextureImageBuffer = _mesa_free_texture_image_data; + driver->MapTextureImage = _swrast_map_teximage; + driver->UnmapTextureImage = _swrast_unmap_teximage; driver->MapTexture = NULL; driver->UnmapTexture = NULL; driver->TextureMemCpy = memcpy; diff --git a/src/mesa/sources.mak b/src/mesa/sources.mak index 5e77e0f5919..deff7bd7850 100644 --- a/src/mesa/sources.mak +++ b/src/mesa/sources.mak @@ -145,6 +145,7 @@ SWRAST_SOURCES = \ swrast/s_texcombine.c \ swrast/s_texfilter.c \ swrast/s_texrender.c \ + swrast/s_texture.c \ swrast/s_triangle.c \ swrast/s_zoom.c diff --git a/src/mesa/swrast/s_texture.c b/src/mesa/swrast/s_texture.c new file mode 100644 index 00000000000..6cc72c582f7 --- /dev/null +++ b/src/mesa/swrast/s_texture.c @@ -0,0 +1,109 @@ +/* + * Mesa 3-D graphics library + * + * Copyright (C) 2011 VMware, Inc. + * + * 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 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. + */ + +/** + * Functions for mapping/unmapping texture images. + */ + + +#include "main/context.h" +#include "main/fbobject.h" +#include "swrast/swrast.h" +#include "swrast/s_context.h" + +/** + * Error checking for debugging only. + */ +static void +_mesa_check_map_teximage(struct gl_texture_image *texImage, + GLuint slice, GLuint x, GLuint y, GLuint w, GLuint h) +{ + + if (texImage->TexObject->Target == GL_TEXTURE_1D) + assert(y == 0 && h == 1); + + assert(x < texImage->Width || texImage->Width == 0); + assert(y < texImage->Height || texImage->Height == 0); + assert(x + w <= texImage->Width); + assert(y + h <= texImage->Height); +} + +/** + * Map a 2D slice of a texture image into user space. + * (x,y,w,h) defines a region of interest (ROI). Reading/writing texels + * outside of the ROI is undefined. + * + * \param texImage the texture image + * \param slice the 3D image slice or array texture slice + * \param x, y, w, h region of interest + * \param mode bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT + * \param mapOut returns start of mapping of region of interest + * \param rowStrideOut returns row stride (in bytes) + */ +void +_swrast_map_teximage(struct gl_context *ctx, + struct gl_texture_image *texImage, + GLuint slice, + GLuint x, GLuint y, GLuint w, GLuint h, + GLbitfield mode, + GLubyte **mapOut, + GLint *rowStrideOut) +{ + GLubyte *map; + GLint stride, texelSize; + GLuint bw, bh; + + _mesa_check_map_teximage(texImage, slice, x, y, w, h); + + texelSize = _mesa_get_format_bytes(texImage->TexFormat); + stride = _mesa_format_row_stride(texImage->TexFormat, texImage->Width); + _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh); + + assert(texImage->Data); + + map = texImage->Data; + + if (texImage->TexObject->Target == GL_TEXTURE_3D || + texImage->TexObject->Target == GL_TEXTURE_2D_ARRAY) { + GLuint sliceSize = _mesa_format_image_size(texImage->TexFormat, + texImage->Width, + texImage->Height, + 1); + assert(slice < texImage->Depth); + map += slice * sliceSize; + } + + /* apply x/y offset to map address */ + map += stride * (y / bh) + texelSize * (x / bw); + + *mapOut = map; + *rowStrideOut = stride; +} + +void +_swrast_unmap_teximage(struct gl_context *ctx, + struct gl_texture_image *texImage, + GLuint slice) +{ + /* nop */ +} diff --git a/src/mesa/swrast/swrast.h b/src/mesa/swrast/swrast.h index 27b74c32486..c8b99863568 100644 --- a/src/mesa/swrast/swrast.h +++ b/src/mesa/swrast/swrast.h @@ -182,6 +182,20 @@ _swrast_render_start( struct gl_context *ctx ); extern void _swrast_render_finish( struct gl_context *ctx ); +extern void +_swrast_map_teximage(struct gl_context *ctx, + struct gl_texture_image *texImage, + GLuint slice, + GLuint x, GLuint y, GLuint w, GLuint h, + GLbitfield mode, + GLubyte **mapOut, + GLint *rowStrideOut); + +extern void +_swrast_unmap_teximage(struct gl_context *ctx, + struct gl_texture_image *texImage, + GLuint slice); + /* Tell the software rasterizer about core state changes. */ extern void |