From a0c4815433ccd57322f4f7703ca35e9ccfa59250 Mon Sep 17 00:00:00 2001 From: marha Date: Thu, 8 Oct 2009 13:15:52 +0000 Subject: Added MesaLib-7.6 --- mesalib/src/mesa/swrast/s_clear.c | 344 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 344 insertions(+) create mode 100644 mesalib/src/mesa/swrast/s_clear.c (limited to 'mesalib/src/mesa/swrast/s_clear.c') diff --git a/mesalib/src/mesa/swrast/s_clear.c b/mesalib/src/mesa/swrast/s_clear.c new file mode 100644 index 000000000..35080fd39 --- /dev/null +++ b/mesalib/src/mesa/swrast/s_clear.c @@ -0,0 +1,344 @@ +/* + * 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/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) +{ + 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(ctx->Visual.rgbMode); + 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(span.array->rgba[i], clearColor); + } + } + 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); + /* write masked row */ + rb->PutRow(ctx, rb, width, x, y + i, span.array->rgba, NULL); + } +} + + +/** + * 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; + SWspan span; + GLint i; + + ASSERT(!ctx->Visual.rgbMode); + ASSERT(rb->PutRow); + ASSERT(rb->DataType == GL_UNSIGNED_INT); + + /* Initialize index span with clear index */ + INIT_SPAN(span, GL_BITMAP); + span.end = width; + span.arrayMask = SPAN_INDEX; + for (i = 0; i < width;i++) { + span.array->index[i] = ctx->Color.ClearIndex; + } + + /* Note that masking will change the color indexes, but only the + * bits for which the write mask is GL_FALSE. The bits + * which are write-enabled won't get modified. + */ + for (i = 0; i < height;i++) { + span.x = x; + span.y = y + i; + _swrast_mask_ci_span(ctx, rb, &span); + /* write masked row */ + rb->PutRow(ctx, rb, width, x, y + i, span.array->index, 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; + } + + 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_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); +} + + +/** + * 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 buf; + + if (ctx->Visual.rgbMode) { + if (ctx->Color.ColorMask[0] && + ctx->Color.ColorMask[1] && + ctx->Color.ColorMask[2] && + ctx->Color.ColorMask[3]) { + masking = GL_FALSE; + } + else { + masking = GL_TRUE; + } + } + else { + struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0]; + const GLuint indexBits = (1 << rb->IndexBits) - 1; + if ((ctx->Color.IndexMask & indexBits) == indexBits) { + masking = GL_FALSE; + } + else { + masking = GL_TRUE; + } + } + + for (buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) { + struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[buf]; + if (ctx->Visual.rgbMode) { + if (masking) { + clear_rgba_buffer_with_masking(ctx, rb); + } + else { + clear_rgba_buffer(ctx, rb); + } + } + else { + if (masking) { + clear_ci_buffer_with_masking(ctx, rb); + } + else { + clear_ci_buffer(ctx, rb); + } + } + } +} + + +/** + * 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 + + 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); +} -- cgit v1.2.3