From be1b8e5d6c6692010a3ec117035d9b218929e2b3 Mon Sep 17 00:00:00 2001 From: Brian Date: Mon, 10 Nov 2008 20:15:28 -0700 Subject: mesa: new _mesa_is_pow_two() function --- src/mesa/main/colortab.c | 2 +- src/mesa/main/histogram.c | 2 +- src/mesa/main/imports.h | 10 ++++++++++ src/mesa/main/pixel.c | 6 +++--- src/mesa/main/teximage.c | 36 ++++++++++++++++++------------------ 5 files changed, 33 insertions(+), 23 deletions(-) (limited to 'src/mesa') diff --git a/src/mesa/main/colortab.c b/src/mesa/main/colortab.c index 97120398f9..bd9cf438b4 100644 --- a/src/mesa/main/colortab.c +++ b/src/mesa/main/colortab.c @@ -383,7 +383,7 @@ _mesa_ColorTable( GLenum target, GLenum internalFormat, return; } - if (width < 0 || (width != 0 && _mesa_bitcount(width) != 1)) { + if (width < 0 || (width != 0 && !_mesa_is_pow_two(width))) { /* error */ if (proxy) { table->Size = 0; diff --git a/src/mesa/main/histogram.c b/src/mesa/main/histogram.c index 77c458d540..905c1ad830 100644 --- a/src/mesa/main/histogram.c +++ b/src/mesa/main/histogram.c @@ -955,7 +955,7 @@ _mesa_Histogram(GLenum target, GLsizei width, GLenum internalFormat, GLboolean s } } - if (width != 0 && _mesa_bitcount(width) != 1) { + if (width != 0 && !_mesa_is_pow_two(width)) { if (target == GL_PROXY_HISTOGRAM) { error = GL_TRUE; } diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h index 89d0662f79..453151ce0b 100644 --- a/src/mesa/main/imports.h +++ b/src/mesa/main/imports.h @@ -462,6 +462,16 @@ static INLINE int iceil(float f) #endif +/** + * Is x a power of two? + */ +static INLINE int +_mesa_is_pow_two(int x) +{ + return !(x & (x - 1)); +} + + /*** *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255] *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255] diff --git a/src/mesa/main/pixel.c b/src/mesa/main/pixel.c index c98506b2bb..8d24a201f0 100644 --- a/src/mesa/main/pixel.c +++ b/src/mesa/main/pixel.c @@ -150,7 +150,7 @@ _mesa_PixelMapfv( GLenum map, GLsizei mapsize, const GLfloat *values ) if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) { /* test that mapsize is a power of two */ - if (_mesa_bitcount((GLuint) mapsize) != 1) { + if (!_mesa_is_pow_two(mapsize)) { _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" ); return; } @@ -209,7 +209,7 @@ _mesa_PixelMapuiv(GLenum map, GLsizei mapsize, const GLuint *values ) if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) { /* test that mapsize is a power of two */ - if (_mesa_bitcount((GLuint) mapsize) != 1) { + if (!_mesa_is_pow_two(mapsize)) { _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" ); return; } @@ -282,7 +282,7 @@ _mesa_PixelMapusv(GLenum map, GLsizei mapsize, const GLushort *values ) if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) { /* test that mapsize is a power of two */ - if (_mesa_bitcount((GLuint) mapsize) != 1) { + if (!_mesa_is_pow_two(mapsize)) { _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapuiv(mapsize)" ); return; } diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c index f9360b474e..9e968ba743 100644 --- a/src/mesa/main/teximage.c +++ b/src/mesa/main/teximage.c @@ -1,5 +1,5 @@ /* - * Mesa 3-D graphics library + * mesa 3-D graphics library * Version: 7.1 * * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. @@ -1233,9 +1233,9 @@ _mesa_init_teximage_fields(GLcontext *ctx, GLenum target, img->IsCompressed = GL_FALSE; img->CompressedSize = 0; - if ((width == 1 || _mesa_bitcount(img->Width2) == 1) && - (height == 1 || _mesa_bitcount(img->Height2) == 1) && - (depth == 1 || _mesa_bitcount(img->Depth2) == 1)) + if ((width == 1 || _mesa_is_pow_two(img->Width2)) && + (height == 1 || _mesa_is_pow_two(img->Height2)) && + (depth == 1 || _mesa_is_pow_two(img->Depth2))) img->_IsPowerOfTwo = GL_TRUE; else img->_IsPowerOfTwo = GL_FALSE; @@ -1306,7 +1306,7 @@ _mesa_test_proxy_teximage(GLcontext *ctx, GLenum target, GLint level, maxSize = 1 << (ctx->Const.MaxTextureLevels - 1); if (width < 2 * border || width > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - width >0 && _mesa_bitcount(width - 2 * border) != 1) || + width >0 && !_mesa_is_pow_two(width - 2 * border)) || level >= ctx->Const.MaxTextureLevels) { /* bad width or level */ return GL_FALSE; @@ -1316,10 +1316,10 @@ _mesa_test_proxy_teximage(GLcontext *ctx, GLenum target, GLint level, maxSize = 1 << (ctx->Const.MaxTextureLevels - 1); if (width < 2 * border || width > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - width > 0 && _mesa_bitcount(width - 2 * border) != 1) || + width > 0 && !_mesa_is_pow_two(width - 2 * border)) || height < 2 * border || height > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - height > 0 && _mesa_bitcount(height - 2 * border) != 1) || + height > 0 && !_mesa_is_pow_two(height - 2 * border)) || level >= ctx->Const.MaxTextureLevels) { /* bad width or height or level */ return GL_FALSE; @@ -1329,13 +1329,13 @@ _mesa_test_proxy_teximage(GLcontext *ctx, GLenum target, GLint level, maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1); if (width < 2 * border || width > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - width > 0 && _mesa_bitcount(width - 2 * border) != 1) || + width > 0 && !_mesa_is_pow_two(width - 2 * border)) || height < 2 * border || height > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - height > 0 && _mesa_bitcount(height - 2 * border) != 1) || + height > 0 && !_mesa_is_pow_two(height - 2 * border)) || depth < 2 * border || depth > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - depth > 0 && _mesa_bitcount(depth - 2 * border) != 1) || + depth > 0 && !_mesa_is_pow_two(depth - 2 * border)) || level >= ctx->Const.Max3DTextureLevels) { /* bad width or height or depth or level */ return GL_FALSE; @@ -1353,10 +1353,10 @@ _mesa_test_proxy_teximage(GLcontext *ctx, GLenum target, GLint level, maxSize = 1 << (ctx->Const.MaxCubeTextureLevels - 1); if (width < 2 * border || width > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - width > 0 && _mesa_bitcount(width - 2 * border) != 1) || + width > 0 && !_mesa_is_pow_two(width - 2 * border)) || height < 2 * border || height > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - height > 0 && _mesa_bitcount(height - 2 * border) != 1) || + height > 0 && !_mesa_is_pow_two(height - 2 * border)) || level >= ctx->Const.MaxCubeTextureLevels) { /* bad width or height */ return GL_FALSE; @@ -1366,7 +1366,7 @@ _mesa_test_proxy_teximage(GLcontext *ctx, GLenum target, GLint level, maxSize = 1 << (ctx->Const.MaxTextureLevels - 1); if (width < 2 * border || width > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - width > 0 && _mesa_bitcount(width - 2 * border) != 1) || + width > 0 && !_mesa_is_pow_two(width - 2 * border)) || level >= ctx->Const.MaxTextureLevels) { /* bad width or level */ return GL_FALSE; @@ -1380,10 +1380,10 @@ _mesa_test_proxy_teximage(GLcontext *ctx, GLenum target, GLint level, maxSize = 1 << (ctx->Const.MaxTextureLevels - 1); if (width < 2 * border || width > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - width > 0 && _mesa_bitcount(width - 2 * border) != 1) || + width > 0 && !_mesa_is_pow_two(width - 2 * border)) || height < 2 * border || height > 2 + maxSize || (!ctx->Extensions.ARB_texture_non_power_of_two && - height > 0 && _mesa_bitcount(height - 2 * border) != 1) || + height > 0 && !_mesa_is_pow_two(height - 2 * border)) || level >= ctx->Const.MaxTextureLevels) { /* bad width or height or level */ return GL_FALSE; @@ -3273,16 +3273,16 @@ compressed_texture_error_check(GLcontext *ctx, GLint dimensions, * XXX We should probably use the proxy texture error check function here. */ if (width < 1 || width > maxTextureSize || - (!ctx->Extensions.ARB_texture_non_power_of_two && _mesa_bitcount(width) != 1)) + (!ctx->Extensions.ARB_texture_non_power_of_two && !_mesa_is_pow_two(width))) return GL_INVALID_VALUE; if ((height < 1 || height > maxTextureSize || - (!ctx->Extensions.ARB_texture_non_power_of_two && _mesa_bitcount(height) != 1)) + (!ctx->Extensions.ARB_texture_non_power_of_two && !_mesa_is_pow_two(height))) && dimensions > 1) return GL_INVALID_VALUE; if ((depth < 1 || depth > maxTextureSize || - (!ctx->Extensions.ARB_texture_non_power_of_two && _mesa_bitcount(depth) != 1)) + (!ctx->Extensions.ARB_texture_non_power_of_two && !_mesa_is_pow_two(depth))) && dimensions > 2) return GL_INVALID_VALUE; -- cgit v1.2.3