diff options
author | Ian Romanick <ian.d.romanick@intel.com> | 2009-09-10 15:33:45 -0700 |
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committer | Ian Romanick <ian.d.romanick@intel.com> | 2009-09-10 15:33:45 -0700 |
commit | b8e1e8d2d8ae6ffbf8f271b46ee89788a926b3b0 (patch) | |
tree | 5db502ab80287bfc8ff61082784017c7448464f5 /src/mesa/main/image.c | |
parent | 81722c5d7e8e93d837510b9e6e5d014ec64cf4b3 (diff) | |
parent | d9dc4cb0e4f578da9e50c9d1ba6fd9c22ea2fca6 (diff) |
Merge branch 'master' into asm-shader-rework-2
Conflicts:
src/mesa/shader/lex.yy.c
src/mesa/shader/program_parse.tab.c
src/mesa/shader/program_parse.tab.h
Diffstat (limited to 'src/mesa/main/image.c')
-rw-r--r-- | src/mesa/main/image.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c index d77c593ac7..baecbab0a3 100644 --- a/src/mesa/main/image.c +++ b/src/mesa/main/image.c @@ -689,6 +689,22 @@ _mesa_is_depth_format(GLenum format) /** + * Test if the given image format is a stencil format. + */ +GLboolean +_mesa_is_stencil_format(GLenum format) +{ + switch (format) { + case GL_STENCIL_INDEX: + case GL_DEPTH_STENCIL: + return GL_TRUE; + default: + return GL_FALSE; + } +} + + +/** * Test if the given image format is a YCbCr format. */ GLboolean @@ -1243,6 +1259,91 @@ _mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source, } +/** + * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel. + * This is typically used to convert a bitmap into a GLubyte/pixel texture. + * "On" bits will set texels to \p onValue. + * "Off" bits will not modify texels. + * \param width src bitmap width in pixels + * \param height src bitmap height in pixels + * \param unpack bitmap unpacking state + * \param bitmap the src bitmap data + * \param destBuffer start of dest buffer + * \param destStride row stride in dest buffer + * \param onValue if bit is 1, set destBuffer pixel to this value + */ +void +_mesa_expand_bitmap(GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap, + GLubyte *destBuffer, GLint destStride, + GLubyte onValue) +{ + const GLubyte *srcRow = (const GLubyte *) + _mesa_image_address2d(unpack, bitmap, width, height, + GL_COLOR_INDEX, GL_BITMAP, 0, 0); + const GLint srcStride = _mesa_image_row_stride(unpack, width, + GL_COLOR_INDEX, GL_BITMAP); + GLint row, col; + +#define SET_PIXEL(COL, ROW) \ + destBuffer[(ROW) * destStride + (COL)] = onValue; + + for (row = 0; row < height; row++) { + const GLubyte *src = srcRow; + + if (unpack->LsbFirst) { + /* Lsb first */ + GLubyte mask = 1U << (unpack->SkipPixels & 0x7); + for (col = 0; col < width; col++) { + + if (*src & mask) { + SET_PIXEL(col, row); + } + + if (mask == 128U) { + src++; + mask = 1U; + } + else { + mask = mask << 1; + } + } + + /* get ready for next row */ + if (mask != 1) + src++; + } + else { + /* Msb first */ + GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); + for (col = 0; col < width; col++) { + + if (*src & mask) { + SET_PIXEL(col, row); + } + + if (mask == 1U) { + src++; + mask = 128U; + } + else { + mask = mask >> 1; + } + } + + /* get ready for next row */ + if (mask != 128) + src++; + } + + srcRow += srcStride; + } /* row */ + +#undef SET_PIXEL +} + + /**********************************************************************/ /***** Pixel processing functions ******/ /**********************************************************************/ |