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authorBrian <brian@i915.localnet.net>2007-06-21 09:15:32 -0600
committerBrian <brian@i915.localnet.net>2007-06-21 09:15:32 -0600
commit171dcdfa27dda30916a7f9bfed89577feee5d350 (patch)
tree88624d960231df741ceaa2e5ed2005ebb97d7e22 /src/mesa/swrast
parentfe11b2c04bf206bd50654c31e6789519c6c07563 (diff)
Another round of fixing attribute interpolation for glDraw/CopyPixels.
Need to turn off FRAG_BIT_COL0 in swrast->_ActiveAttribMask when doing glRead/CopyPixels to prevent the user's colors from getting overwritten when a fragment program is active. This was happening in the DRI drivers when MaintainTexEnv program was used (the texenv fragment program was enabled when _swrast_DrawPixels was called). This still isn't an ideal solution, but fixes things for now.
Diffstat (limited to 'src/mesa/swrast')
-rw-r--r--src/mesa/swrast/s_copypix.c14
-rw-r--r--src/mesa/swrast/s_drawpix.c17
-rw-r--r--src/mesa/swrast/s_span.c16
3 files changed, 32 insertions, 15 deletions
diff --git a/src/mesa/swrast/s_copypix.c b/src/mesa/swrast/s_copypix.c
index 53e584b3b6..2383015000 100644
--- a/src/mesa/swrast/s_copypix.c
+++ b/src/mesa/swrast/s_copypix.c
@@ -188,6 +188,8 @@ static void
copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
GLint width, GLint height, GLint destx, GLint desty)
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLbitfield prevActiveAttribs = swrast->_ActiveAttribMask;
GLfloat *tmpImage, *p;
GLint sy, dy, stepy, row;
const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F;
@@ -197,12 +199,15 @@ copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
if (!ctx->ReadBuffer->_ColorReadBuffer) {
/* no readbuffer - OK */
- return;
+ goto end;
}
+ /* don't interpolate COL0 and overwrite the glDrawPixel colors! */
+ swrast->_ActiveAttribMask &= ~FRAG_BIT_COL0;
+
if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
copy_conv_rgba_pixels(ctx, srcx, srcy, width, height, destx, desty);
- return;
+ goto end;
}
else if (ctx->Pixel.Convolution1DEnabled) {
/* make sure we don't apply 1D convolution */
@@ -239,7 +244,7 @@ copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
tmpImage = (GLfloat *) _mesa_malloc(width * height * sizeof(GLfloat) * 4);
if (!tmpImage) {
_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" );
- return;
+ goto end;
}
/* read the source image as RGBA/float */
p = tmpImage;
@@ -294,6 +299,9 @@ copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
if (overlapping)
_mesa_free(tmpImage);
+
+end:
+ swrast->_ActiveAttribMask = prevActiveAttribs;
}
diff --git a/src/mesa/swrast/s_drawpix.c b/src/mesa/swrast/s_drawpix.c
index d971d90fb9..925358d77e 100644
--- a/src/mesa/swrast/s_drawpix.c
+++ b/src/mesa/swrast/s_drawpix.c
@@ -532,16 +532,22 @@ draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels )
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ const GLbitfield prevActiveAttribs = swrast->_ActiveAttribMask;
const GLint imgX = x, imgY = y;
const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
GLfloat *convImage = NULL;
GLbitfield transferOps = ctx->_ImageTransferState;
SWspan span;
+ /* don't interpolate COL0 and overwrite the glDrawPixel colors! */
+ swrast->_ActiveAttribMask &= ~FRAG_BIT_COL0;
+
/* Try an optimized glDrawPixels first */
if (fast_draw_rgba_pixels(ctx, x, y, width, height, format, type,
- unpack, pixels))
- return;
+ unpack, pixels)) {
+ goto end;
+ }
INIT_SPAN(span, GL_BITMAP, 0, 0x0, SPAN_RGBA);
_swrast_span_default_attribs(ctx, &span);
@@ -559,13 +565,13 @@ draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
tmpImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
if (!tmpImage) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
- return;
+ goto end;
}
convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
if (!convImage) {
_mesa_free(tmpImage);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
- return;
+ goto end;
}
/* Unpack the image and apply transfer ops up to convolution */
@@ -669,6 +675,9 @@ draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
if (convImage) {
_mesa_free(convImage);
}
+
+end:
+ swrast->_ActiveAttribMask = prevActiveAttribs;
}
diff --git a/src/mesa/swrast/s_span.c b/src/mesa/swrast/s_span.c
index 3aaa3395e4..431629efb1 100644
--- a/src/mesa/swrast/s_span.c
+++ b/src/mesa/swrast/s_span.c
@@ -171,6 +171,11 @@ interpolate_active_attribs(GLcontext *ctx, SWspan *span, GLbitfield attrMask)
{
const SWcontext *swrast = SWRAST_CONTEXT(ctx);
+ /* for glDraw/CopyPixels() we may have turned off some bits in
+ * the _ActiveAttribMask - be sure to obey that mask now.
+ */
+ attrMask &= swrast->_ActiveAttribMask;
+
ATTRIB_LOOP_BEGIN
if (attrMask & (1 << attr)) {
const GLfloat dwdx = span->attrStepX[FRAG_ATTRIB_WPOS][3];
@@ -1169,15 +1174,10 @@ shade_texture_span(GLcontext *ctx, SWspan *span)
if (ctx->FragmentProgram._Current ||
ctx->ATIFragmentShader._Enabled) {
/* programmable shading */
- if (span->primitive == GL_BITMAP) {
- if (span->array->ChanType != GL_FLOAT)
- convert_color_type(span, GL_FLOAT, 0);
- interpolate_active_attribs(ctx, span, ~FRAG_ATTRIB_COL0);
- }
- else {
- /* point, line, triangle */
- interpolate_active_attribs(ctx, span, ~0);
+ if (span->primitive == GL_BITMAP && span->array->ChanType != GL_FLOAT) {
+ convert_color_type(span, GL_FLOAT, 0);
}
+ interpolate_active_attribs(ctx, span, ~0);
span->array->ChanType = GL_FLOAT;
if (!(span->arrayMask & SPAN_Z))