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Diffstat (limited to 'src/mesa/swrast/s_buffers.c')
-rw-r--r--src/mesa/swrast/s_buffers.c109
1 files changed, 71 insertions, 38 deletions
diff --git a/src/mesa/swrast/s_buffers.c b/src/mesa/swrast/s_buffers.c
index 894cc4060f..7888bb618f 100644
--- a/src/mesa/swrast/s_buffers.c
+++ b/src/mesa/swrast/s_buffers.c
@@ -1,6 +1,6 @@
/*
* Mesa 3-D graphics library
- * Version: 6.0.1
+ * Version: 6.1
*
* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
*
@@ -30,16 +30,17 @@
#include "s_accum.h"
#include "s_alphabuf.h"
+#include "s_auxbuffer.h"
#include "s_context.h"
#include "s_depth.h"
#include "s_masking.h"
#include "s_stencil.h"
-
-
-/*
+/**
* Clear the color buffer when glColorMask or glIndexMask is in effect.
+ * We'll have specified which color buffer to clear by previously
+ * calling Driver.SetBuffer().
*/
static void
clear_color_buffer_with_masking( GLcontext *ctx )
@@ -86,9 +87,10 @@ clear_color_buffer_with_masking( GLcontext *ctx )
}
-
-/*
+/**
* Clear a color buffer without index/channel masking.
+ * We'll have specified which color buffer to clear by previously
+ * calling Driver.SetBuffer().
*/
static void
clear_color_buffer(GLcontext *ctx)
@@ -131,11 +133,10 @@ clear_color_buffer(GLcontext *ctx)
}
-
-/*
- * Clear the front/back/left/right color buffers.
- * This function is usually only called if we need to clear the
- * buffers with masking.
+/**
+ * Clear the front/back/left/right/aux color buffers.
+ * This function is usually only called if the device driver can't
+ * clear its own color buffers for some reason (such as with masking).
*/
static void
clear_color_buffers(GLcontext *ctx)
@@ -145,7 +146,7 @@ clear_color_buffers(GLcontext *ctx)
GLuint bufferBit;
/* loop over four possible dest color buffers */
- for (bufferBit = 1; bufferBit <= 8; bufferBit = bufferBit << 1) {
+ for (bufferBit = 1; bufferBit <= DD_AUX3_BIT; bufferBit <<= 1) {
if (bufferBit & ctx->Color._DrawDestMask) {
(*swrast->Driver.SetBuffer)(ctx, ctx->DrawBuffer, bufferBit);
@@ -163,7 +164,12 @@ clear_color_buffers(GLcontext *ctx)
}
-
+/**
+ * Called via the device driver's ctx->Driver.Clear() function if the
+ * device driver can't clear one or more of the buffers itself.
+ * \param mask bitwise-OR of DD_*_BIT flags.
+ * \param all if GL_TRUE, clear whole buffer, else clear specified region.
+ */
void
_swrast_Clear( GLcontext *ctx, GLbitfield mask,
GLboolean all,
@@ -172,13 +178,18 @@ _swrast_Clear( GLcontext *ctx, GLbitfield mask,
SWcontext *swrast = SWRAST_CONTEXT(ctx);
#ifdef DEBUG
{
- GLbitfield legalBits = DD_FRONT_LEFT_BIT |
+ const GLbitfield legalBits =
+ DD_FRONT_LEFT_BIT |
DD_FRONT_RIGHT_BIT |
DD_BACK_LEFT_BIT |
DD_BACK_RIGHT_BIT |
DD_DEPTH_BIT |
DD_STENCIL_BIT |
- DD_ACCUM_BIT;
+ DD_ACCUM_BIT |
+ DD_AUX0_BIT |
+ DD_AUX1_BIT |
+ DD_AUX2_BIT |
+ DD_AUX3_BIT;
assert((mask & (~legalBits)) == 0);
}
#endif
@@ -187,23 +198,34 @@ _swrast_Clear( GLcontext *ctx, GLbitfield mask,
/* do software clearing here */
if (mask) {
- if (mask & ctx->Color._DrawDestMask) clear_color_buffers(ctx);
- if (mask & GL_DEPTH_BUFFER_BIT) _swrast_clear_depth_buffer(ctx);
- if (mask & GL_ACCUM_BUFFER_BIT) _swrast_clear_accum_buffer(ctx);
- if (mask & GL_STENCIL_BUFFER_BIT) _swrast_clear_stencil_buffer(ctx);
- }
-
- /* clear software-based alpha buffer(s) */
- if ( (mask & GL_COLOR_BUFFER_BIT)
- && ctx->DrawBuffer->UseSoftwareAlphaBuffers
- && ctx->Color.ColorMask[ACOMP]) {
- _swrast_clear_alpha_buffers( ctx );
+ if (mask & ctx->Color._DrawDestMask) {
+ clear_color_buffers(ctx);
+ /* clear software-based alpha buffer(s) */
+ if (ctx->DrawBuffer->UseSoftwareAlphaBuffers
+ && ctx->Color.ColorMask[ACOMP]) {
+ _swrast_clear_alpha_buffers( ctx );
+ }
+ }
+ if (mask & DD_DEPTH_BIT) {
+ _swrast_clear_depth_buffer(ctx);
+ }
+ if (mask & DD_ACCUM_BIT) {
+ _swrast_clear_accum_buffer(ctx);
+ }
+ if (mask & DD_STENCIL_BIT) {
+ _swrast_clear_stencil_buffer(ctx);
+ }
}
RENDER_FINISH(swrast,ctx);
}
+/**
+ * Typically called via ctx->Driver.ResizeBuffers().
+ * Reallocate all software-based depth/stencil/accum/etc buffers
+ * to match current window dimensions.
+ */
void
_swrast_alloc_buffers( GLframebuffer *buffer )
{
@@ -220,6 +242,9 @@ _swrast_alloc_buffers( GLframebuffer *buffer )
if (buffer->UseSoftwareAlphaBuffers) {
_swrast_alloc_alpha_buffers( buffer );
}
+ if (buffer->UseSoftwareAuxBuffers) {
+ _swrast_alloc_aux_buffers( buffer );
+ }
}
@@ -244,9 +269,9 @@ _swrast_use_read_buffer( GLcontext *ctx )
SWcontext *swrast = SWRAST_CONTEXT(ctx);
/* Do this so the software-emulated alpha plane span functions work! */
- swrast->CurrentBuffer = ctx->Pixel._ReadSrcMask;
+ swrast->CurrentBufferBit = ctx->Pixel._ReadSrcMask;
/* Tell the device driver where to read/write spans */
- (*swrast->Driver.SetBuffer)( ctx, ctx->ReadBuffer, swrast->CurrentBuffer );
+ swrast->Driver.SetBuffer(ctx, ctx->ReadBuffer, swrast->CurrentBufferBit);
}
@@ -270,17 +295,25 @@ _swrast_use_draw_buffer( GLcontext *ctx )
* we loop over multiple color buffers when needed.
*/
- if (ctx->Color._DrawDestMask & FRONT_LEFT_BIT)
- swrast->CurrentBuffer = FRONT_LEFT_BIT;
- else if (ctx->Color._DrawDestMask & BACK_LEFT_BIT)
- swrast->CurrentBuffer = BACK_LEFT_BIT;
- else if (ctx->Color._DrawDestMask & FRONT_RIGHT_BIT)
- swrast->CurrentBuffer = FRONT_RIGHT_BIT;
- else if (ctx->Color._DrawDestMask & BACK_RIGHT_BIT)
- swrast->CurrentBuffer = BACK_RIGHT_BIT;
+ if (ctx->Color._DrawDestMask & DD_FRONT_LEFT_BIT)
+ swrast->CurrentBufferBit = DD_FRONT_LEFT_BIT;
+ else if (ctx->Color._DrawDestMask & DD_BACK_LEFT_BIT)
+ swrast->CurrentBufferBit = DD_BACK_LEFT_BIT;
+ else if (ctx->Color._DrawDestMask & DD_FRONT_RIGHT_BIT)
+ swrast->CurrentBufferBit = DD_FRONT_RIGHT_BIT;
+ else if (ctx->Color._DrawDestMask & DD_BACK_RIGHT_BIT)
+ swrast->CurrentBufferBit = DD_BACK_RIGHT_BIT;
+ else if (ctx->Color._DrawDestMask & DD_AUX0_BIT)
+ swrast->CurrentBufferBit = DD_AUX0_BIT;
+ else if (ctx->Color._DrawDestMask & DD_AUX1_BIT)
+ swrast->CurrentBufferBit = DD_AUX1_BIT;
+ else if (ctx->Color._DrawDestMask & DD_AUX2_BIT)
+ swrast->CurrentBufferBit = DD_AUX2_BIT;
+ else if (ctx->Color._DrawDestMask & DD_AUX3_BIT)
+ swrast->CurrentBufferBit = DD_AUX3_BIT;
else
/* glDrawBuffer(GL_NONE) */
- swrast->CurrentBuffer = FRONT_LEFT_BIT; /* we always have this buffer */
+ swrast->CurrentBufferBit = DD_FRONT_LEFT_BIT; /* we always have this buffer */
- (*swrast->Driver.SetBuffer)( ctx, ctx->DrawBuffer, swrast->CurrentBuffer );
+ swrast->Driver.SetBuffer(ctx, ctx->DrawBuffer, swrast->CurrentBufferBit);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 15:43:23 +0000