diff options
Diffstat (limited to 'src/mesa/swrast/s_readpix.c')
| -rw-r--r-- | src/mesa/swrast/s_readpix.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c index ecabac6..368311e 100644 --- a/src/mesa/swrast/s_readpix.c +++ b/src/mesa/swrast/s_readpix.c @@ -253,21 +253,21 @@ fast_read_rgba_pixels( GLcontext *ctx, /** * When we're using a low-precision color buffer (like 16-bit 5/6/5) * we have to adjust our color values a bit to pass conformance. - * The problem is when a 5 or 6-bit color value is convert to an 8-bit + * The problem is when a 5 or 6-bit color value is converted to an 8-bit * value and then a floating point value, the floating point values don't * increment uniformly as the 5 or 6-bit value is incremented. * * This function adjusts floating point values to compensate. */ static void -adjust_colors(GLcontext *ctx, GLuint n, GLfloat rgba[][4]) +adjust_colors(const struct gl_framebuffer *fb, GLuint n, GLfloat rgba[][4]) { - const GLuint rShift = 8 - ctx->Visual.redBits; - const GLuint gShift = 8 - ctx->Visual.greenBits; - const GLuint bShift = 8 - ctx->Visual.blueBits; - const GLfloat rScale = 1.0F / (GLfloat) ((1 << ctx->Visual.redBits ) - 1); - const GLfloat gScale = 1.0F / (GLfloat) ((1 << ctx->Visual.greenBits) - 1); - const GLfloat bScale = 1.0F / (GLfloat) ((1 << ctx->Visual.blueBits ) - 1); + const GLuint rShift = 8 - fb->Visual.redBits; + const GLuint gShift = 8 - fb->Visual.greenBits; + const GLuint bShift = 8 - fb->Visual.blueBits; + const GLfloat rScale = 1.0F / (GLfloat) ((1 << fb->Visual.redBits ) - 1); + const GLfloat gScale = 1.0F / (GLfloat) ((1 << fb->Visual.greenBits) - 1); + const GLfloat bScale = 1.0F / (GLfloat) ((1 << fb->Visual.blueBits ) - 1); GLuint i; for (i = 0; i < n; i++) { GLint r, g, b; @@ -390,7 +390,7 @@ read_rgba_pixels( GLcontext *ctx, if (fb->Visual.redBits < 8 || fb->Visual.greenBits < 8 || fb->Visual.blueBits < 8) { - adjust_colors(ctx, width, rgba); + adjust_colors(fb, width, rgba); } /* pack the row of RGBA pixels into user's buffer */ |