diff options
Diffstat (limited to 'mesalib/src/mesa/swrast/s_readpix.c')
| -rw-r--r-- | mesalib/src/mesa/swrast/s_readpix.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/mesalib/src/mesa/swrast/s_readpix.c b/mesalib/src/mesa/swrast/s_readpix.c index 368311e14..1de481248 100644 --- a/mesalib/src/mesa/swrast/s_readpix.c +++ b/mesalib/src/mesa/swrast/s_readpix.c @@ -27,7 +27,6 @@ #include "main/bufferobj.h" #include "main/colormac.h" #include "main/convolve.h" -#include "main/context.h" #include "main/feedback.h" #include "main/formats.h" #include "main/image.h" @@ -192,7 +191,8 @@ fast_read_rgba_pixels( GLcontext *ctx, if (!rb) return GL_FALSE; - ASSERT(rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB); + ASSERT(rb->_BaseFormat == GL_RGBA || rb->_BaseFormat == GL_RGB || + rb->_BaseFormat == GL_ALPHA); /* clipping should have already been done */ ASSERT(x + width <= (GLint) rb->Width); @@ -265,10 +265,18 @@ adjust_colors(const struct gl_framebuffer *fb, GLuint n, GLfloat rgba[][4]) 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); + GLfloat rScale = 1.0F / (GLfloat) ((1 << fb->Visual.redBits ) - 1); + GLfloat gScale = 1.0F / (GLfloat) ((1 << fb->Visual.greenBits) - 1); + GLfloat bScale = 1.0F / (GLfloat) ((1 << fb->Visual.blueBits ) - 1); GLuint i; + + if (fb->Visual.redBits == 0) + rScale = 0; + if (fb->Visual.greenBits == 0) + gScale = 0; + if (fb->Visual.blueBits == 0) + bScale = 0; + for (i = 0; i < n; i++) { GLint r, g, b; /* convert float back to ubyte */ |