-/* $Id: s_buffers.c,v 1.2 2000/11/13 20:02:57 keithw Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ * Version: 6.5.2
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
- *
+ *
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+/** XXX This file should be named s_clear.c */
#include "glheader.h"
+#include "colormac.h"
#include "macros.h"
-#include "mem.h"
+#include "imports.h"
+#include "mtypes.h"
#include "s_accum.h"
-#include "s_alphabuf.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.
+/**
+ * Clear the color buffer when glColorMask is in effect.
*/
static void
-clear_color_buffer_with_masking( GLcontext *ctx )
+clear_rgba_buffer_with_masking(GLcontext *ctx, struct gl_renderbuffer *rb)
{
const GLint x = ctx->DrawBuffer->_Xmin;
const GLint y = ctx->DrawBuffer->_Ymin;
const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
-
- if (ctx->Visual.RGBAflag) {
- /* RGBA mode */
- const GLchan r = (GLint) (ctx->Color.ClearColor[0] * CHAN_MAXF);
- const GLchan g = (GLint) (ctx->Color.ClearColor[1] * CHAN_MAXF);
- const GLchan b = (GLint) (ctx->Color.ClearColor[2] * CHAN_MAXF);
- const GLchan a = (GLint) (ctx->Color.ClearColor[3] * CHAN_MAXF);
- GLint i;
- for (i = 0; i < height; i++) {
- GLchan rgba[MAX_WIDTH][4];
- GLint j;
- for (j=0; j<width; j++) {
- rgba[j][RCOMP] = r;
- rgba[j][GCOMP] = g;
- rgba[j][BCOMP] = b;
- rgba[j][ACOMP] = a;
- }
- _mesa_mask_rgba_span( ctx, width, x, y + i, rgba );
- (*ctx->Driver.WriteRGBASpan)( ctx, width, x, y + i,
- (CONST GLchan (*)[4]) rgba, NULL );
+ GLchan clearColor[4];
+ GLint i;
+
+ ASSERT(ctx->Visual.rgbMode);
+ ASSERT(rb->PutRow);
+
+ CLAMPED_FLOAT_TO_CHAN(clearColor[RCOMP], ctx->Color.ClearColor[0]);
+ CLAMPED_FLOAT_TO_CHAN(clearColor[GCOMP], ctx->Color.ClearColor[1]);
+ CLAMPED_FLOAT_TO_CHAN(clearColor[BCOMP], ctx->Color.ClearColor[2]);
+ CLAMPED_FLOAT_TO_CHAN(clearColor[ACOMP], ctx->Color.ClearColor[3]);
+
+ for (i = 0; i < height; i++) {
+ struct sw_span span;
+ GLchan rgba[MAX_WIDTH][4];
+ GLint j;
+ for (j = 0; j < width; j++) {
+ COPY_CHAN4(rgba[j], clearColor);
}
+ /* setup span struct for masking */
+ INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_RGBA);
+ span.x = x;
+ span.y = y + i;
+ _swrast_mask_rgba_span(ctx, rb, &span, rgba);
+ /* write masked row */
+ rb->PutRow(ctx, rb, width, x, y + i, rgba, NULL);
}
- else {
- /* Color index mode */
- GLuint span[MAX_WIDTH];
- GLubyte mask[MAX_WIDTH];
- GLint i, j;
- MEMSET( mask, 1, width );
- for (i=0;i<height;i++) {
- for (j=0;j<width;j++) {
- span[j] = ctx->Color.ClearIndex;
- }
- _mesa_mask_index_span( ctx, width, x, y + i, span );
- (*ctx->Driver.WriteCI32Span)( ctx, width, x, y + i, span, mask );
+}
+
+
+/**
+ * Clear color index buffer with masking.
+ */
+static void
+clear_ci_buffer_with_masking(GLcontext *ctx, struct gl_renderbuffer *rb)
+{
+ const GLint x = ctx->DrawBuffer->_Xmin;
+ const GLint y = ctx->DrawBuffer->_Ymin;
+ const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+ const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ GLint i;
+
+ ASSERT(!ctx->Visual.rgbMode);
+ ASSERT(rb->PutRow);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
+
+ for (i = 0; i < height;i++) {
+ struct sw_span span;
+ GLuint indexes[MAX_WIDTH];
+ GLint j;
+ for (j = 0; j < width;j++) {
+ indexes[j] = ctx->Color.ClearIndex;
}
+ /* setup span struct for masking */
+ INIT_SPAN(span, GL_BITMAP, width, 0, SPAN_RGBA);
+ span.x = x;
+ span.y = y + i;
+ _swrast_mask_ci_span(ctx, rb, &span, indexes);
+ /* write masked row */
+ rb->PutRow(ctx, rb, width, x, y + i, indexes, NULL);
}
}
+/**
+ * Clear an rgba color buffer without channel masking.
+ */
+static void
+clear_rgba_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
+{
+ const GLint x = ctx->DrawBuffer->_Xmin;
+ const GLint y = ctx->DrawBuffer->_Ymin;
+ const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
+ const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ GLubyte clear8[4];
+ GLushort clear16[4];
+ GLvoid *clearVal;
+ GLint i;
+
+ ASSERT(ctx->Visual.rgbMode);
+
+ ASSERT(ctx->Color.ColorMask[0] &&
+ ctx->Color.ColorMask[1] &&
+ ctx->Color.ColorMask[2] &&
+ ctx->Color.ColorMask[3]);
+
+ ASSERT(rb->PutMonoRow);
+
+ switch (rb->DataType) {
+ case GL_UNSIGNED_BYTE:
+ UNCLAMPED_FLOAT_TO_UBYTE(clear8[0], ctx->Color.ClearColor[0]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clear8[1], ctx->Color.ClearColor[1]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clear8[2], ctx->Color.ClearColor[2]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clear8[3], ctx->Color.ClearColor[3]);
+ clearVal = clear8;
+ break;
+ case GL_UNSIGNED_SHORT:
+ UNCLAMPED_FLOAT_TO_USHORT(clear16[0], ctx->Color.ClearColor[0]);
+ UNCLAMPED_FLOAT_TO_USHORT(clear16[1], ctx->Color.ClearColor[1]);
+ UNCLAMPED_FLOAT_TO_USHORT(clear16[2], ctx->Color.ClearColor[2]);
+ UNCLAMPED_FLOAT_TO_USHORT(clear16[3], ctx->Color.ClearColor[3]);
+ clearVal = clear16;
+ break;
+ case GL_FLOAT:
+ clearVal = ctx->Color.ClearColor;
+ break;
+ default:
+ _mesa_problem(ctx, "Bad rb DataType in clear_color_buffer");
+ return;
+ }
-/*
- * Clear a color buffer without index/channel masking.
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
+ }
+}
+
+
+/**
+ * Clear color index buffer without masking.
*/
static void
-clear_color_buffer(GLcontext *ctx)
+clear_ci_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
{
const GLint x = ctx->DrawBuffer->_Xmin;
const GLint y = ctx->DrawBuffer->_Ymin;
const GLint height = ctx->DrawBuffer->_Ymax - ctx->DrawBuffer->_Ymin;
const GLint width = ctx->DrawBuffer->_Xmax - ctx->DrawBuffer->_Xmin;
+ GLubyte clear8;
+ GLushort clear16;
+ GLuint clear32;
+ GLvoid *clearVal;
+ GLint i;
+
+ ASSERT(!ctx->Visual.rgbMode);
+
+ ASSERT((ctx->Color.IndexMask & ((1 << rb->IndexBits) - 1))
+ == (GLuint) ((1 << rb->IndexBits) - 1));
+
+ ASSERT(rb->PutMonoRow);
+
+ /* setup clear value */
+ switch (rb->DataType) {
+ case GL_UNSIGNED_BYTE:
+ clear8 = (GLubyte) ctx->Color.ClearIndex;
+ clearVal = &clear8;
+ break;
+ case GL_UNSIGNED_SHORT:
+ clear16 = (GLushort) ctx->Color.ClearIndex;
+ clearVal = &clear16;
+ break;
+ case GL_UNSIGNED_INT:
+ clear32 = ctx->Color.ClearIndex;
+ clearVal = &clear32;
+ break;
+ default:
+ _mesa_problem(ctx, "Bad rb DataType in clear_color_buffer");
+ return;
+ }
+
+ for (i = 0; i < height; i++)
+ rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
+}
+
- if (ctx->Visual.RGBAflag) {
- /* RGBA mode */
- const GLchan r = (GLint) (ctx->Color.ClearColor[0] * CHAN_MAXF);
- const GLchan g = (GLint) (ctx->Color.ClearColor[1] * CHAN_MAXF);
- const GLchan b = (GLint) (ctx->Color.ClearColor[2] * CHAN_MAXF);
- const GLchan a = (GLint) (ctx->Color.ClearColor[3] * CHAN_MAXF);
- GLchan span[MAX_WIDTH][4];
- GLint i;
-
- ASSERT(*((GLuint *) &ctx->Color.ColorMask) == 0xffffffff);
-
- for (i = 0; i < width; i++) {
- span[i][RCOMP] = r;
- span[i][GCOMP] = g;
- span[i][BCOMP] = b;
- span[i][ACOMP] = a;
+/**
+ * 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)
+{
+ GLboolean masking;
+ GLuint i;
+
+ if (ctx->Visual.rgbMode) {
+ if (ctx->Color.ColorMask[0] &&
+ ctx->Color.ColorMask[1] &&
+ ctx->Color.ColorMask[2] &&
+ ctx->Color.ColorMask[3]) {
+ masking = GL_FALSE;
}
- for (i = 0; i < height; i++) {
- (*ctx->Driver.WriteRGBASpan)( ctx, width, x, y + i,
- (CONST GLchan (*)[4]) span, NULL );
+ else {
+ masking = GL_TRUE;
}
}
else {
- /* Color index mode */
- ASSERT(ctx->Color.IndexMask == ~0);
- if (ctx->Visual.IndexBits == 8) {
- /* 8-bit clear */
- GLubyte span[MAX_WIDTH];
- GLint i;
- MEMSET(span, ctx->Color.ClearIndex, width);
- for (i = 0; i < height; i++) {
- (*ctx->Driver.WriteCI8Span)( ctx, width, x, y + i, span, NULL );
- }
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
+ const GLuint indexBits = (1 << rb->IndexBits) - 1;
+ if ((ctx->Color.IndexMask & indexBits) == indexBits) {
+ masking = GL_FALSE;
}
else {
- /* non 8-bit clear */
- GLuint span[MAX_WIDTH];
- GLint i;
- for (i = 0; i < width; i++) {
- span[i] = ctx->Color.ClearIndex;
- }
- for (i = 0; i < height; i++) {
- (*ctx->Driver.WriteCI32Span)( ctx, width, x, y + i, span, NULL );
- }
+ masking = GL_TRUE;
}
}
-}
-
-
-/*
- * Clear the front/back/left/right color buffers.
- * This function is usually only called if we need to clear the
- * buffers with masking.
- */
-static void
-clear_color_buffers(GLcontext *ctx)
-{
- const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
- GLuint bufferBit;
-
- /* loop over four possible dest color buffers */
- for (bufferBit = 1; bufferBit <= 8; bufferBit = bufferBit << 1) {
- if (bufferBit & ctx->Color.DrawDestMask) {
- if (bufferBit == FRONT_LEFT_BIT) {
- (void) (*ctx->Driver.SetDrawBuffer)( ctx, GL_FRONT_LEFT);
- (void) (*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer, GL_FRONT_LEFT);
- }
- else if (bufferBit == FRONT_RIGHT_BIT) {
- (void) (*ctx->Driver.SetDrawBuffer)( ctx, GL_FRONT_RIGHT);
- (void) (*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer, GL_FRONT_RIGHT);
- }
- else if (bufferBit == BACK_LEFT_BIT) {
- (void) (*ctx->Driver.SetDrawBuffer)( ctx, GL_BACK_LEFT);
- (void) (*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer, GL_BACK_LEFT);
+ for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers[0]; i++) {
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][i];
+ if (ctx->Visual.rgbMode) {
+ if (masking) {
+ clear_rgba_buffer_with_masking(ctx, rb);
}
else {
- (void) (*ctx->Driver.SetDrawBuffer)( ctx, GL_BACK_RIGHT);
- (void) (*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer, GL_BACK_RIGHT);
+ clear_rgba_buffer(ctx, rb);
}
-
- if (colorMask != 0xffffffff) {
- clear_color_buffer_with_masking(ctx);
+ }
+ else {
+ if (masking) {
+ clear_ci_buffer_with_masking(ctx, rb);
}
else {
- clear_color_buffer(ctx);
+ clear_ci_buffer(ctx, rb);
}
}
}
-
- /* restore default read/draw buffers */
- (void) (*ctx->Driver.SetDrawBuffer)( ctx, ctx->Color.DriverDrawBuffer );
- (void) (*ctx->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer, ctx->Pixel.DriverReadBuffer );
}
-
-void
-_swrast_Clear( GLcontext *ctx, GLbitfield mask,
- GLboolean all,
- GLint x, GLint y, GLint width, GLint height )
+/**
+ * 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 bitfield of BUFER_BIT_* values indicating which renderbuffers
+ * are to be cleared.
+ * \param all if GL_TRUE, clear whole buffer, else clear specified region.
+ */
+void
+_swrast_Clear(GLcontext *ctx, GLbitfield mask,
+ GLboolean all, GLint x, GLint y, GLint width, GLint height)
{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ (void) all; (void) x; (void) y; (void) width; (void) height;
-#ifdef DEBUG
+#ifdef DEBUG_FOO
{
- 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;
+ const GLbitfield legalBits =
+ BUFFER_BIT_FRONT_LEFT |
+ BUFFER_BIT_FRONT_RIGHT |
+ BUFFER_BIT_BACK_LEFT |
+ BUFFER_BIT_BACK_RIGHT |
+ BUFFER_BIT_DEPTH |
+ BUFFER_BIT_STENCIL |
+ BUFFER_BIT_ACCUM |
+ BUFFER_BIT_AUX0 |
+ BUFFER_BIT_AUX1 |
+ BUFFER_BIT_AUX2 |
+ BUFFER_BIT_AUX3;
assert((mask & (~legalBits)) == 0);
}
#endif
- RENDER_START(ctx);
+ RENDER_START(swrast,ctx);
/* do software clearing here */
if (mask) {
- if (mask & ctx->Color.DrawDestMask) clear_color_buffers(ctx);
- if (mask & GL_DEPTH_BUFFER_BIT) _mesa_clear_depth_buffer(ctx);
- if (mask & GL_ACCUM_BUFFER_BIT) _mesa_clear_accum_buffer(ctx);
- if (mask & GL_STENCIL_BUFFER_BIT) _mesa_clear_stencil_buffer(ctx);
- }
-
- /* clear software-based alpha buffer(s) */
- if ( (mask & GL_COLOR_BUFFER_BIT)
- && ctx->DrawBuffer->UseSoftwareAlphaBuffers
- && ctx->Color.ColorMask[ACOMP]) {
- _mesa_clear_alpha_buffers( ctx );
+ if (mask & ctx->DrawBuffer->_ColorDrawBufferMask[0]) {
+ clear_color_buffers(ctx);
+ }
+ if (mask & BUFFER_BIT_DEPTH) {
+ _swrast_clear_depth_buffer(ctx, ctx->DrawBuffer->_DepthBuffer);
+ }
+ if (mask & BUFFER_BIT_ACCUM) {
+ _swrast_clear_accum_buffer(ctx,
+ ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);
+ }
+ if (mask & BUFFER_BIT_STENCIL) {
+ _swrast_clear_stencil_buffer(ctx, ctx->DrawBuffer->_StencilBuffer);
+ }
}
- RENDER_FINISH(ctx);
+ RENDER_FINISH(swrast,ctx);
}
-
-
-void
-_swrast_alloc_buffers( GLcontext *ctx )
-{
- /* Reallocate other buffers if needed. */
- if (ctx->DrawBuffer->UseSoftwareDepthBuffer) {
- _mesa_alloc_depth_buffer( ctx );
- }
- if (ctx->DrawBuffer->UseSoftwareStencilBuffer) {
- _mesa_alloc_stencil_buffer( ctx );
- }
- if (ctx->DrawBuffer->UseSoftwareAccumBuffer) {
- _mesa_alloc_accum_buffer( ctx );
- }
- if (ctx->DrawBuffer->UseSoftwareAlphaBuffers) {
- _mesa_alloc_alpha_buffers( ctx );
- }
-}
-
-
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