[Mesa-dev] [PATCH 2/4] mesa: rewrite accum buffer support
Brian Paul
brianp at vmware.com
Sat Dec 3 09:07:36 PST 2011
Implemented in terms of renderbuffer mapping/unmapping and format
packing/unpacking functions.
The swrast and state tracker code for implementing accumulation are
unused and will be removed in the next commit.
---
src/mesa/SConscript | 2 -
src/mesa/drivers/common/driverfuncs.c | 3 +-
src/mesa/drivers/dri/intel/intel_pixel.c | 2 +-
src/mesa/main/accum.c | 368 +++++++++++++++++++++++++++++-
src/mesa/main/accum.h | 18 ++
src/mesa/sources.mak | 2 -
src/mesa/state_tracker/st_cb_clear.c | 5 +-
src/mesa/state_tracker/st_cb_fbo.c | 21 ++
src/mesa/state_tracker/st_context.c | 5 +-
src/mesa/swrast/s_clear.c | 5 +-
10 files changed, 416 insertions(+), 15 deletions(-)
diff --git a/src/mesa/SConscript b/src/mesa/SConscript
index 5c50189..633cb9c 100644
--- a/src/mesa/SConscript
+++ b/src/mesa/SConscript
@@ -153,7 +153,6 @@ math_sources = [
swrast_sources = [
'swrast/s_aaline.c',
'swrast/s_aatriangle.c',
- 'swrast/s_accum.c',
'swrast/s_alpha.c',
'swrast/s_atifragshader.c',
'swrast/s_bitmap.c',
@@ -241,7 +240,6 @@ statetracker_sources = [
'state_tracker/st_atom_stipple.c',
'state_tracker/st_atom_texture.c',
'state_tracker/st_atom_viewport.c',
- 'state_tracker/st_cb_accum.c',
'state_tracker/st_cb_bitmap.c',
'state_tracker/st_cb_blit.c',
'state_tracker/st_cb_bufferobjects.c',
diff --git a/src/mesa/drivers/common/driverfuncs.c b/src/mesa/drivers/common/driverfuncs.c
index 50fcede..0785cff 100644
--- a/src/mesa/drivers/common/driverfuncs.c
+++ b/src/mesa/drivers/common/driverfuncs.c
@@ -25,6 +25,7 @@
#include "main/glheader.h"
#include "main/imports.h"
+#include "main/accum.h"
#include "main/arrayobj.h"
#include "main/context.h"
#include "main/framebuffer.h"
@@ -80,7 +81,7 @@ _mesa_init_driver_functions(struct dd_function_table *driver)
/* framebuffer/image functions */
driver->Clear = _swrast_Clear;
- driver->Accum = _swrast_Accum;
+ driver->Accum = _mesa_accum;
driver->RasterPos = _tnl_RasterPos;
driver->DrawPixels = _swrast_DrawPixels;
driver->ReadPixels = _mesa_readpixels;
diff --git a/src/mesa/drivers/dri/intel/intel_pixel.c b/src/mesa/drivers/dri/intel/intel_pixel.c
index ae2ac05..4f665a7 100644
--- a/src/mesa/drivers/dri/intel/intel_pixel.c
+++ b/src/mesa/drivers/dri/intel/intel_pixel.c
@@ -157,7 +157,7 @@ intel_check_blit_format(struct intel_region * region,
void
intelInitPixelFuncs(struct dd_function_table *functions)
{
- functions->Accum = _swrast_Accum;
+ functions->Accum = _mesa_accum;
if (!getenv("INTEL_NO_BLIT")) {
functions->Bitmap = intelBitmap;
functions->CopyPixels = intelCopyPixels;
diff --git a/src/mesa/main/accum.c b/src/mesa/main/accum.c
index d7ed3a8..e45a6ca 100644
--- a/src/mesa/main/accum.c
+++ b/src/mesa/main/accum.c
@@ -24,7 +24,10 @@
#include "glheader.h"
#include "accum.h"
+#include "condrender.h"
#include "context.h"
+#include "format_unpack.h"
+#include "format_pack.h"
#include "imports.h"
#include "macros.h"
#include "mfeatures.h"
@@ -101,7 +104,7 @@ _mesa_Accum( GLenum op, GLfloat value )
return;
if (ctx->RenderMode == GL_RENDER) {
- ctx->Driver.Accum(ctx, op, value);
+ _mesa_accum(ctx, op, value);
}
}
@@ -123,3 +126,366 @@ _mesa_init_accum( struct gl_context *ctx )
/* Accumulate buffer group */
ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 );
}
+
+
+
+
+/**
+ * Clear the accumulation buffer by mapping the renderbuffer and
+ * writing the clear color to it. Called by the driver's implementation
+ * of the glClear function.
+ */
+void
+_mesa_clear_accum_buffer(struct gl_context *ctx)
+{
+ GLuint x, y, width, height;
+ GLubyte *accMap;
+ GLint accRowStride;
+ struct gl_renderbuffer *accRb;
+
+ if (!ctx->DrawBuffer)
+ return;
+
+ accRb = ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ if (!accRb)
+ return; /* missing accum buffer, not an error */
+
+ /* bounds, with scissor */
+ x = ctx->DrawBuffer->_Xmin;
+ y = ctx->DrawBuffer->_Ymin;
+ width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+ ctx->Driver.MapRenderbuffer(ctx, accRb, x, y, width, height,
+ GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
+ &accMap, &accRowStride);
+
+ if (!accMap) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glAccum");
+ return;
+ }
+
+ if (accRb->Format == MESA_FORMAT_SIGNED_RGBA_16) {
+ const GLshort clearR = FLOAT_TO_SHORT(ctx->Accum.ClearColor[0]);
+ const GLshort clearG = FLOAT_TO_SHORT(ctx->Accum.ClearColor[1]);
+ const GLshort clearB = FLOAT_TO_SHORT(ctx->Accum.ClearColor[2]);
+ const GLshort clearA = FLOAT_TO_SHORT(ctx->Accum.ClearColor[3]);
+ GLshort *firstRow = (GLshort *) accMap;
+ GLuint i, j;
+
+ /* clear the first row */
+ for (i = 0; i < width; i++) {
+ firstRow[i * 4 + 0] = clearR;
+ firstRow[i * 4 + 1] = clearG;
+ firstRow[i * 4 + 2] = clearB;
+ firstRow[i * 4 + 3] = clearA;
+ }
+ accMap += accRowStride;
+
+ /* and memcpy the first row to the other rows to clear them */
+ for (j = 1; j < height; j++) {
+ memcpy(accMap, firstRow, 4 * width * sizeof(GLshort));
+ accMap += accRowStride;
+ }
+ }
+ else {
+ /* other types someday? */
+ _mesa_warning(ctx, "unexpected accum buffer type");
+ }
+
+ ctx->Driver.UnmapRenderbuffer(ctx, accRb);
+}
+
+
+/**
+ * if (bias)
+ * Accum += value
+ * else
+ * Accum *= value
+ */
+static void
+accum_scale_or_bias(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height,
+ GLboolean bias)
+{
+ struct gl_renderbuffer *accRb =
+ ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ GLubyte *accMap;
+ GLint accRowStride;
+
+ assert(accRb);
+
+ ctx->Driver.MapRenderbuffer(ctx, accRb, xpos, ypos, width, height,
+ GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
+ &accMap, &accRowStride);
+
+ if (!accMap) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glAccum");
+ return;
+ }
+
+ if (accRb->Format == MESA_FORMAT_SIGNED_RGBA_16) {
+ const GLshort incr = (GLshort) (value * 32767.0f);
+ GLuint i, j;
+ if (bias) {
+ for (j = 0; j < height; j++) {
+ GLshort *acc = (GLshort *) accMap;
+ for (i = 0; i < 4 * width; i++) {
+ acc[i] += incr;
+ }
+ accMap += accRowStride;
+ }
+ }
+ else {
+ /* scale */
+ for (j = 0; j < height; j++) {
+ GLshort *acc = (GLshort *) accMap;
+ for (i = 0; i < 4 * width; i++) {
+ acc[i] = (GLshort) (acc[i] * value);
+ }
+ accMap += accRowStride;
+ }
+ }
+ }
+ else {
+ /* other types someday? */
+ }
+
+ ctx->Driver.UnmapRenderbuffer(ctx, accRb);
+}
+
+
+/**
+ * if (load)
+ * Accum = ColorBuf * value
+ * else
+ * Accum += ColorBuf * value
+ */
+static void
+accum_or_load(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height,
+ GLboolean load)
+{
+ struct gl_renderbuffer *accRb =
+ ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer;
+ struct gl_renderbuffer *colorRb = ctx->ReadBuffer->_ColorReadBuffer;
+ GLubyte *accMap, *colorMap;
+ GLint accRowStride, colorRowStride;
+
+ if (!colorRb) {
+ /* no read buffer - OK */
+ return;
+ }
+
+ assert(accRb);
+
+ /* Map accum buffer */
+ ctx->Driver.MapRenderbuffer(ctx, accRb, xpos, ypos, width, height,
+ GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
+ &accMap, &accRowStride);
+ if (!accMap) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glAccum");
+ return;
+ }
+
+ /* Map color buffer */
+ ctx->Driver.MapRenderbuffer(ctx, colorRb, xpos, ypos, width, height,
+ GL_MAP_READ_BIT,
+ &colorMap, &colorRowStride);
+ if (!colorMap) {
+ ctx->Driver.UnmapRenderbuffer(ctx, accRb);
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glAccum");
+ return;
+ }
+
+ if (accRb->Format == MESA_FORMAT_SIGNED_RGBA_16) {
+ const GLfloat scale = value * 32767.0f;
+ GLuint i, j;
+
+ for (j = 0; j < height; j++) {
+ GLshort *acc = (GLshort *) accMap;
+ GLfloat rgba[MAX_WIDTH][4];
+
+ /* read colors from source color buffer */
+ _mesa_unpack_rgba_row(colorRb->Format, width, colorMap, rgba);
+
+ if (load) {
+ for (i = 0; i < width; i++) {
+ acc[i * 4 + 0] = (GLshort) (rgba[i][RCOMP] * scale);
+ acc[i * 4 + 1] = (GLshort) (rgba[i][GCOMP] * scale);
+ acc[i * 4 + 2] = (GLshort) (rgba[i][BCOMP] * scale);
+ acc[i * 4 + 3] = (GLshort) (rgba[i][ACOMP] * scale);
+ }
+ }
+ else {
+ /* accumulate */
+ for (i = 0; i < width; i++) {
+ acc[i * 4 + 0] += (GLshort) (rgba[i][RCOMP] * scale);
+ acc[i * 4 + 1] += (GLshort) (rgba[i][GCOMP] * scale);
+ acc[i * 4 + 2] += (GLshort) (rgba[i][BCOMP] * scale);
+ acc[i * 4 + 3] += (GLshort) (rgba[i][ACOMP] * scale);
+ }
+ }
+
+ colorMap += colorRowStride;
+ accMap += accRowStride;
+ }
+ }
+ else {
+ /* other types someday? */
+ }
+
+ ctx->Driver.UnmapRenderbuffer(ctx, accRb);
+ ctx->Driver.UnmapRenderbuffer(ctx, colorRb);
+}
+
+
+/**
+ * ColorBuffer = Accum * value
+ */
+static void
+accum_return(struct gl_context *ctx, GLfloat value,
+ GLint xpos, GLint ypos, GLint width, GLint height)
+{
+ struct gl_framebuffer *fb = ctx->DrawBuffer;
+ struct gl_renderbuffer *accRb = fb->Attachment[BUFFER_ACCUM].Renderbuffer;
+ GLubyte *accMap, *colorMap;
+ GLint accRowStride, colorRowStride;
+ GLuint buffer;
+
+ /* Map accum buffer */
+ ctx->Driver.MapRenderbuffer(ctx, accRb, xpos, ypos, width, height,
+ GL_MAP_READ_BIT,
+ &accMap, &accRowStride);
+ if (!accMap) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glAccum");
+ return;
+ }
+
+ /* Loop over destination buffers */
+ for (buffer = 0; buffer < fb->_NumColorDrawBuffers; buffer++) {
+ struct gl_renderbuffer *colorRb = fb->_ColorDrawBuffers[buffer];
+ const GLboolean masking = (!ctx->Color.ColorMask[buffer][RCOMP] ||
+ !ctx->Color.ColorMask[buffer][GCOMP] ||
+ !ctx->Color.ColorMask[buffer][BCOMP] ||
+ !ctx->Color.ColorMask[buffer][ACOMP]);
+
+ /* Map color buffer */
+ ctx->Driver.MapRenderbuffer(ctx, colorRb, xpos, ypos, width, height,
+ GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
+ &colorMap, &colorRowStride);
+ if (!colorMap) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glAccum");
+ continue;
+ }
+
+ if (accRb->Format == MESA_FORMAT_SIGNED_RGBA_16) {
+ const GLfloat scale = value / 32767.0f;
+ GLint i, j;
+
+ for (j = 0; j < height; j++) {
+ GLshort *acc = (GLshort *) accMap;
+ GLfloat rgba[MAX_WIDTH][4];
+
+ for (i = 0; i < width; i++) {
+ rgba[i][0] = acc[i * 4 + 0] * scale;
+ rgba[i][1] = acc[i * 4 + 1] * scale;
+ rgba[i][2] = acc[i * 4 + 2] * scale;
+ rgba[i][3] = acc[i * 4 + 3] * scale;
+ }
+
+ if (masking) {
+ GLfloat dest[MAX_WIDTH][4];
+
+ /* get existing colors from dest buffer */
+ _mesa_unpack_rgba_row(colorRb->Format, width, colorMap, dest);
+
+ /* use the dest colors where mask[channel] = 0 */
+ if (ctx->Color.ColorMask[buffer][RCOMP] == 0) {
+ for (i = 0; i < width; i++)
+ rgba[i][RCOMP] = dest[i][RCOMP];
+ }
+ if (ctx->Color.ColorMask[buffer][GCOMP] == 0) {
+ for (i = 0; i < width; i++)
+ rgba[i][GCOMP] = dest[i][GCOMP];
+ }
+ if (ctx->Color.ColorMask[buffer][BCOMP] == 0) {
+ for (i = 0; i < width; i++)
+ rgba[i][BCOMP] = dest[i][BCOMP];
+ }
+ if (ctx->Color.ColorMask[buffer][ACOMP] == 0) {
+ for (i = 0; i < width; i++)
+ rgba[i][ACOMP] = dest[i][ACOMP];
+ }
+ }
+
+ _mesa_pack_float_rgba_row(colorRb->Format, width,
+ (const GLfloat (*)[4]) rgba, colorMap);
+
+ accMap += accRowStride;
+ colorMap += colorRowStride;
+ }
+
+ }
+ else {
+ /* other types someday? */
+ }
+
+ ctx->Driver.UnmapRenderbuffer(ctx, colorRb);
+ }
+
+ ctx->Driver.UnmapRenderbuffer(ctx, accRb);
+}
+
+
+
+/**
+ * Software fallback for glAccum. A hardware driver that supports
+ * signed 16-bit color channels could implement hardware accumulation
+ * operations, but no driver does so at this time.
+ */
+void
+_mesa_accum(struct gl_context *ctx, GLenum op, GLfloat value)
+{
+ GLint xpos, ypos, width, height;
+
+ if (!ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer) {
+ _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer");
+ return;
+ }
+
+ if (!_mesa_check_conditional_render(ctx))
+ return;
+
+ xpos = ctx->DrawBuffer->_Xmin;
+ ypos = ctx->DrawBuffer->_Ymin;
+ width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+
+ switch (op) {
+ case GL_ADD:
+ if (value != 0.0F) {
+ accum_scale_or_bias(ctx, value, xpos, ypos, width, height, GL_TRUE);
+ }
+ break;
+ case GL_MULT:
+ if (value != 1.0F) {
+ accum_scale_or_bias(ctx, value, xpos, ypos, width, height, GL_FALSE);
+ }
+ break;
+ case GL_ACCUM:
+ if (value != 0.0F) {
+ accum_or_load(ctx, value, xpos, ypos, width, height, GL_FALSE);
+ }
+ break;
+ case GL_LOAD:
+ accum_or_load(ctx, value, xpos, ypos, width, height, GL_TRUE);
+ break;
+ case GL_RETURN:
+ accum_return(ctx, value, xpos, ypos, width, height);
+ break;
+ default:
+ _mesa_problem(ctx, "invalid mode in _mesa_accum()");
+ break;
+ }
+}
diff --git a/src/mesa/main/accum.h b/src/mesa/main/accum.h
index f16378c..5b3f06a 100644
--- a/src/mesa/main/accum.h
+++ b/src/mesa/main/accum.h
@@ -42,6 +42,7 @@
struct _glapi_table;
struct gl_context;
+struct gl_renderbuffer;
#if FEATURE_accum
@@ -51,6 +52,12 @@ _mesa_ClearAccum( GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha );
extern void
_mesa_init_accum_dispatch(struct _glapi_table *disp);
+extern void
+_mesa_accum(struct gl_context *ctx, GLenum op, GLfloat value);
+
+extern void
+_mesa_clear_accum_buffer(struct gl_context *ctx);
+
#else /* FEATURE_accum */
#include "main/compiler.h"
@@ -67,6 +74,17 @@ _mesa_init_accum_dispatch(struct _glapi_table *disp)
{
}
+static inline void
+_mesa_accum(struct gl_context *ctx, GLenum op, GLfloat value)
+{
+}
+
+static inline void
+_mesa_clear_accum_buffer(struct gl_context *ctx)
+{
+}
+
+
#endif /* FEATURE_accum */
extern void
diff --git a/src/mesa/sources.mak b/src/mesa/sources.mak
index cd18f46..be27c97 100644
--- a/src/mesa/sources.mak
+++ b/src/mesa/sources.mak
@@ -125,7 +125,6 @@ MATH_XFORM_SOURCES = \
SWRAST_SOURCES = \
swrast/s_aaline.c \
swrast/s_aatriangle.c \
- swrast/s_accum.c \
swrast/s_alpha.c \
swrast/s_atifragshader.c \
swrast/s_bitmap.c \
@@ -209,7 +208,6 @@ STATETRACKER_SOURCES = \
state_tracker/st_atom_stipple.c \
state_tracker/st_atom_texture.c \
state_tracker/st_atom_viewport.c \
- state_tracker/st_cb_accum.c \
state_tracker/st_cb_bitmap.c \
state_tracker/st_cb_blit.c \
state_tracker/st_cb_bufferobjects.c \
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 89273e2..61d98ae 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -34,12 +34,12 @@
*/
#include "main/glheader.h"
+#include "main/accum.h"
#include "main/formats.h"
#include "main/macros.h"
#include "program/prog_instruction.h"
#include "st_context.h"
#include "st_atom.h"
-#include "st_cb_accum.h"
#include "st_cb_clear.h"
#include "st_cb_fbo.h"
#include "st_format.h"
@@ -599,8 +599,7 @@ st_Clear(struct gl_context *ctx, GLbitfield mask)
ctx->Depth.Clear, ctx->Stencil.Clear);
}
if (mask & BUFFER_BIT_ACCUM)
- st_clear_accum_buffer(ctx,
- ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);
+ _mesa_clear_accum_buffer(ctx);
}
diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
index 2a60ed4..ec40a2b 100644
--- a/src/mesa/state_tracker/st_cb_fbo.c
+++ b/src/mesa/state_tracker/st_cb_fbo.c
@@ -667,6 +667,22 @@ st_MapRenderbuffer(struct gl_context *ctx,
unsigned usage;
GLuint y2;
+ if (strb->software) {
+ /* software-allocated renderbuffer (probably an accum buffer) */
+ GLubyte *map = (GLubyte *) strb->data;
+ if (strb->data) {
+ map += strb->stride * y;
+ map += util_format_get_blocksize(strb->format) * x;
+ *mapOut = map;
+ *rowStrideOut = strb->stride;
+ }
+ else {
+ *mapOut = NULL;
+ *rowStrideOut = 0;
+ }
+ return;
+ }
+
usage = 0x0;
if (mode & GL_MAP_READ_BIT)
usage |= PIPE_TRANSFER_READ;
@@ -716,6 +732,11 @@ st_UnmapRenderbuffer(struct gl_context *ctx,
struct st_renderbuffer *strb = st_renderbuffer(rb);
struct pipe_context *pipe = st->pipe;
+ if (strb->software) {
+ /* software-allocated renderbuffer (probably an accum buffer) */
+ return;
+ }
+
pipe_transfer_unmap(pipe, strb->transfer);
pipe->transfer_destroy(pipe, strb->transfer);
strb->transfer = NULL;
diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index a181772..dc1d33f 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -26,6 +26,7 @@
**************************************************************************/
#include "main/imports.h"
+#include "main/accum.h"
#include "main/context.h"
#include "main/samplerobj.h"
#include "main/shaderobj.h"
@@ -34,7 +35,6 @@
#include "glapi/glapi.h"
#include "st_context.h"
#include "st_debug.h"
-#include "st_cb_accum.h"
#include "st_cb_bitmap.h"
#include "st_cb_blit.h"
#include "st_cb_bufferobjects.h"
@@ -276,7 +276,8 @@ void st_init_driver_functions(struct dd_function_table *functions)
_mesa_init_shader_object_functions(functions);
_mesa_init_sampler_object_functions(functions);
- st_init_accum_functions(functions);
+ functions->Accum = _mesa_accum;
+
st_init_blit_functions(functions);
st_init_bufferobject_functions(functions);
st_init_clear_functions(functions);
diff --git a/src/mesa/swrast/s_clear.c b/src/mesa/swrast/s_clear.c
index 980d29b..615747d 100644
--- a/src/mesa/swrast/s_clear.c
+++ b/src/mesa/swrast/s_clear.c
@@ -23,13 +23,13 @@
*/
#include "main/glheader.h"
+#include "main/accum.h"
#include "main/colormac.h"
#include "main/condrender.h"
#include "main/macros.h"
#include "main/imports.h"
#include "main/mtypes.h"
-#include "s_accum.h"
#include "s_context.h"
#include "s_depth.h"
#include "s_masking.h"
@@ -225,8 +225,7 @@ _swrast_Clear(struct gl_context *ctx, GLbitfield buffers)
_swrast_clear_depth_buffer(ctx, ctx->DrawBuffer->_DepthBuffer);
}
if (buffers & BUFFER_BIT_ACCUM) {
- _swrast_clear_accum_buffer(ctx,
- ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);
+ _mesa_clear_accum_buffer(ctx);
}
if (buffers & BUFFER_BIT_STENCIL) {
_swrast_clear_stencil_buffer(ctx, ctx->DrawBuffer->_StencilBuffer);
--
1.7.3.4
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