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author | marha <marha@users.sourceforge.net> | 2010-12-29 12:20:21 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2010-12-29 12:20:21 +0000 |
commit | 053f5dfd42ade05252e586a282e34906db10828d (patch) | |
tree | de215580ce205409a6d810a005c6c5909f3145d1 /mesalib/src/mesa/swrast/s_clear.c | |
parent | 04ceb8c4a0cca3d8682f094d1d6faed8f693afb5 (diff) | |
parent | 807c6931fe683fd844ceec1b023232181e6aae03 (diff) | |
download | vcxsrv-053f5dfd42ade05252e586a282e34906db10828d.tar.gz vcxsrv-053f5dfd42ade05252e586a282e34906db10828d.tar.bz2 vcxsrv-053f5dfd42ade05252e586a282e34906db10828d.zip |
svn merge ^/branches/released .
Diffstat (limited to 'mesalib/src/mesa/swrast/s_clear.c')
-rw-r--r-- | mesalib/src/mesa/swrast/s_clear.c | 460 |
1 files changed, 230 insertions, 230 deletions
diff --git a/mesalib/src/mesa/swrast/s_clear.c b/mesalib/src/mesa/swrast/s_clear.c index efe500ae2..fac092f1e 100644 --- a/mesalib/src/mesa/swrast/s_clear.c +++ b/mesalib/src/mesa/swrast/s_clear.c @@ -1,230 +1,230 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2008 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 - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include "main/glheader.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" -#include "s_stencil.h" - - -/** - * Clear the color buffer when glColorMask is in effect. - */ -static void -clear_rgba_buffer_with_masking(GLcontext *ctx, struct gl_renderbuffer *rb, - GLuint buf) -{ - 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; - SWspan span; - GLint i; - - ASSERT(rb->PutRow); - - /* Initialize color span with clear color */ - /* XXX optimize for clearcolor == black/zero (bzero) */ - INIT_SPAN(span, GL_BITMAP); - span.end = width; - span.arrayMask = SPAN_RGBA; - span.array->ChanType = rb->DataType; - if (span.array->ChanType == GL_UNSIGNED_BYTE) { - GLubyte clearColor[4]; - UNCLAMPED_FLOAT_TO_UBYTE(clearColor[RCOMP], ctx->Color.ClearColor[0]); - UNCLAMPED_FLOAT_TO_UBYTE(clearColor[GCOMP], ctx->Color.ClearColor[1]); - UNCLAMPED_FLOAT_TO_UBYTE(clearColor[BCOMP], ctx->Color.ClearColor[2]); - UNCLAMPED_FLOAT_TO_UBYTE(clearColor[ACOMP], ctx->Color.ClearColor[3]); - for (i = 0; i < width; i++) { - COPY_4UBV(span.array->rgba[i], clearColor); - } - } - else if (span.array->ChanType == GL_UNSIGNED_SHORT) { - GLushort clearColor[4]; - UNCLAMPED_FLOAT_TO_USHORT(clearColor[RCOMP], ctx->Color.ClearColor[0]); - UNCLAMPED_FLOAT_TO_USHORT(clearColor[GCOMP], ctx->Color.ClearColor[1]); - UNCLAMPED_FLOAT_TO_USHORT(clearColor[BCOMP], ctx->Color.ClearColor[2]); - UNCLAMPED_FLOAT_TO_USHORT(clearColor[ACOMP], ctx->Color.ClearColor[3]); - for (i = 0; i < width; i++) { - COPY_4V_CAST(span.array->rgba[i], clearColor, GLchan); - } - } - else { - ASSERT(span.array->ChanType == GL_FLOAT); - for (i = 0; i < width; i++) { - CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][0], ctx->Color.ClearColor[0]); - CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][1], ctx->Color.ClearColor[1]); - CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][2], ctx->Color.ClearColor[2]); - CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][3], ctx->Color.ClearColor[3]); - } - } - - /* Note that masking will change the color values, but only the - * channels for which the write mask is GL_FALSE. The channels - * which which are write-enabled won't get modified. - */ - for (i = 0; i < height; i++) { - span.x = x; - span.y = y + i; - _swrast_mask_rgba_span(ctx, rb, &span, buf); - /* write masked row */ - rb->PutRow(ctx, rb, width, x, y + i, span.array->rgba, NULL); - } -} - - -/** - * Clear an rgba color buffer without channel masking. - */ -static void -clear_rgba_buffer(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint buf) -{ - 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->Color.ColorMask[buf][0] && - ctx->Color.ColorMask[buf][1] && - ctx->Color.ColorMask[buf][2] && - ctx->Color.ColorMask[buf][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; - } - - for (i = 0; i < height; i++) { - rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL); - } -} - - -/** - * 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) -{ - GLuint buf; - - for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) { - struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[buf]; - if (ctx->Color.ColorMask[buf][0] == 0 || - ctx->Color.ColorMask[buf][1] == 0 || - ctx->Color.ColorMask[buf][2] == 0 || - ctx->Color.ColorMask[buf][3] == 0) { - clear_rgba_buffer_with_masking(ctx, rb, buf); - } - else { - clear_rgba_buffer(ctx, rb, buf); - } - } -} - - -/** - * 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 buffers bitfield of BUFFER_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 buffers) -{ -#ifdef DEBUG_FOO - { - 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; - assert((buffers & (~legalBits)) == 0); - } -#endif - - if (!_mesa_check_conditional_render(ctx)) - return; /* don't clear */ - - swrast_render_start(ctx); - - /* do software clearing here */ - if (buffers) { - if ((buffers & BUFFER_BITS_COLOR) - && (ctx->DrawBuffer->_NumColorDrawBuffers > 0)) { - clear_color_buffers(ctx); - } - if (buffers & BUFFER_BIT_DEPTH) { - _swrast_clear_depth_buffer(ctx, ctx->DrawBuffer->_DepthBuffer); - } - if (buffers & BUFFER_BIT_ACCUM) { - _swrast_clear_accum_buffer(ctx, - ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer); - } - if (buffers & BUFFER_BIT_STENCIL) { - _swrast_clear_stencil_buffer(ctx, ctx->DrawBuffer->_StencilBuffer); - } - } - - swrast_render_finish(ctx); -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2008 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
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "main/glheader.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"
+#include "s_stencil.h"
+
+
+/**
+ * Clear the color buffer when glColorMask is in effect.
+ */
+static void
+clear_rgba_buffer_with_masking(struct gl_context *ctx, struct gl_renderbuffer *rb,
+ GLuint buf)
+{
+ 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;
+ SWspan span;
+ GLint i;
+
+ ASSERT(rb->PutRow);
+
+ /* Initialize color span with clear color */
+ /* XXX optimize for clearcolor == black/zero (bzero) */
+ INIT_SPAN(span, GL_BITMAP);
+ span.end = width;
+ span.arrayMask = SPAN_RGBA;
+ span.array->ChanType = rb->DataType;
+ if (span.array->ChanType == GL_UNSIGNED_BYTE) {
+ GLubyte clearColor[4];
+ UNCLAMPED_FLOAT_TO_UBYTE(clearColor[RCOMP], ctx->Color.ClearColor[0]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clearColor[GCOMP], ctx->Color.ClearColor[1]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clearColor[BCOMP], ctx->Color.ClearColor[2]);
+ UNCLAMPED_FLOAT_TO_UBYTE(clearColor[ACOMP], ctx->Color.ClearColor[3]);
+ for (i = 0; i < width; i++) {
+ COPY_4UBV(span.array->rgba[i], clearColor);
+ }
+ }
+ else if (span.array->ChanType == GL_UNSIGNED_SHORT) {
+ GLushort clearColor[4];
+ UNCLAMPED_FLOAT_TO_USHORT(clearColor[RCOMP], ctx->Color.ClearColor[0]);
+ UNCLAMPED_FLOAT_TO_USHORT(clearColor[GCOMP], ctx->Color.ClearColor[1]);
+ UNCLAMPED_FLOAT_TO_USHORT(clearColor[BCOMP], ctx->Color.ClearColor[2]);
+ UNCLAMPED_FLOAT_TO_USHORT(clearColor[ACOMP], ctx->Color.ClearColor[3]);
+ for (i = 0; i < width; i++) {
+ COPY_4V_CAST(span.array->rgba[i], clearColor, GLchan);
+ }
+ }
+ else {
+ ASSERT(span.array->ChanType == GL_FLOAT);
+ for (i = 0; i < width; i++) {
+ CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][0], ctx->Color.ClearColor[0]);
+ CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][1], ctx->Color.ClearColor[1]);
+ CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][2], ctx->Color.ClearColor[2]);
+ CLAMPED_FLOAT_TO_CHAN(span.array->rgba[i][3], ctx->Color.ClearColor[3]);
+ }
+ }
+
+ /* Note that masking will change the color values, but only the
+ * channels for which the write mask is GL_FALSE. The channels
+ * which which are write-enabled won't get modified.
+ */
+ for (i = 0; i < height; i++) {
+ span.x = x;
+ span.y = y + i;
+ _swrast_mask_rgba_span(ctx, rb, &span, buf);
+ /* write masked row */
+ rb->PutRow(ctx, rb, width, x, y + i, span.array->rgba, NULL);
+ }
+}
+
+
+/**
+ * Clear an rgba color buffer without channel masking.
+ */
+static void
+clear_rgba_buffer(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint buf)
+{
+ 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->Color.ColorMask[buf][0] &&
+ ctx->Color.ColorMask[buf][1] &&
+ ctx->Color.ColorMask[buf][2] &&
+ ctx->Color.ColorMask[buf][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;
+ }
+
+ for (i = 0; i < height; i++) {
+ rb->PutMonoRow(ctx, rb, width, x, y + i, clearVal, NULL);
+ }
+}
+
+
+/**
+ * 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(struct gl_context *ctx)
+{
+ GLuint buf;
+
+ for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[buf];
+ if (ctx->Color.ColorMask[buf][0] == 0 ||
+ ctx->Color.ColorMask[buf][1] == 0 ||
+ ctx->Color.ColorMask[buf][2] == 0 ||
+ ctx->Color.ColorMask[buf][3] == 0) {
+ clear_rgba_buffer_with_masking(ctx, rb, buf);
+ }
+ else {
+ clear_rgba_buffer(ctx, rb, buf);
+ }
+ }
+}
+
+
+/**
+ * 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 buffers bitfield of BUFFER_BIT_* values indicating which
+ * renderbuffers are to be cleared.
+ * \param all if GL_TRUE, clear whole buffer, else clear specified region.
+ */
+void
+_swrast_Clear(struct gl_context *ctx, GLbitfield buffers)
+{
+#ifdef DEBUG_FOO
+ {
+ 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;
+ assert((buffers & (~legalBits)) == 0);
+ }
+#endif
+
+ if (!_mesa_check_conditional_render(ctx))
+ return; /* don't clear */
+
+ swrast_render_start(ctx);
+
+ /* do software clearing here */
+ if (buffers) {
+ if ((buffers & BUFFER_BITS_COLOR)
+ && (ctx->DrawBuffer->_NumColorDrawBuffers > 0)) {
+ clear_color_buffers(ctx);
+ }
+ if (buffers & BUFFER_BIT_DEPTH) {
+ _swrast_clear_depth_buffer(ctx, ctx->DrawBuffer->_DepthBuffer);
+ }
+ if (buffers & BUFFER_BIT_ACCUM) {
+ _swrast_clear_accum_buffer(ctx,
+ ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);
+ }
+ if (buffers & BUFFER_BIT_STENCIL) {
+ _swrast_clear_stencil_buffer(ctx, ctx->DrawBuffer->_StencilBuffer);
+ }
+ }
+
+ swrast_render_finish(ctx);
+}
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