006a9e008b
The OpenGL software renderer add-on should follow soon. Allow to link GLTeapot as native, but without renderer, nothing is displayed ;-) git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13283 a95241bf-73f2-0310-859d-f6bbb57e9c96
130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 6.1
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*
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* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "glheader.h"
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#include "imports.h"
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#include "s_auxbuffer.h"
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#include "s_context.h"
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/**
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* Allocate memory for the software auxillary buffers associated with
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* the given GLframebuffer. Free any currently allocated aux buffers
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* first.
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*/
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void
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_swrast_alloc_aux_buffers( GLframebuffer *buffer )
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{
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GLint i;
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ASSERT(buffer->UseSoftwareAuxBuffers);
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for (i = 0; i < buffer->Visual.numAuxBuffers; i++) {
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if (buffer->AuxBuffers[i]) {
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_mesa_free(buffer->AuxBuffers[i]);
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buffer->AuxBuffers[i] = NULL;
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}
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buffer->AuxBuffers[i] = (GLchan *) _mesa_malloc(buffer->Width
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* buffer->Height * 4 * sizeof(GLchan));
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}
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}
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/* RGBA */
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#define NAME(PREFIX) PREFIX##_aux
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#define SPAN_VARS \
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const SWcontext *swrast = SWRAST_CONTEXT(ctx);
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#define INIT_PIXEL_PTR(P, X, Y) \
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GLchan *P = swrast->CurAuxBuffer + ((Y) * ctx->DrawBuffer->Width + (X)) * 4; \
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assert(swrast->CurAuxBuffer);
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#define INC_PIXEL_PTR(P) P += 4
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#if CHAN_TYPE == GL_FLOAT
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#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \
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P[0] = MAX2((R), 0.0F); \
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P[1] = MAX2((G), 0.0F); \
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P[2] = MAX2((B), 0.0F); \
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P[3] = CHAN_MAXF
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#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \
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P[0] = MAX2((R), 0.0F); \
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P[1] = MAX2((G), 0.0F); \
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P[2] = MAX2((B), 0.0F); \
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P[3] = CLAMP((A), 0.0F, CHAN_MAXF)
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#else
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#define STORE_RGB_PIXEL(P, X, Y, R, G, B) \
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P[0] = R; P[1] = G; P[2] = B; P[3] = CHAN_MAX
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#define STORE_RGBA_PIXEL(P, X, Y, R, G, B, A) \
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P[0] = R; P[1] = G; P[2] = B; P[3] = A
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#endif
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#define FETCH_RGBA_PIXEL(R, G, B, A, P) \
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R = P[0]; G = P[1]; B = P[2]; A = P[3]
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#include "swrast/s_spantemp.h"
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/**
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* Called from driver's SetBuffer() function to choose an aux buffer.
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*/
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void
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_swrast_use_aux_buffer(GLcontext *ctx, GLframebuffer *buffer, GLuint bufferBit)
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{
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SWcontext *swrast = SWRAST_CONTEXT(ctx);
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(void) buffer;
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switch (bufferBit) {
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case DD_AUX0_BIT:
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ASSERT(buffer->Visual.numAuxBuffers >= 1);
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swrast->CurAuxBuffer = ctx->DrawBuffer->AuxBuffers[0];
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break;
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case DD_AUX1_BIT:
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ASSERT(buffer->Visual.numAuxBuffers >= 2);
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swrast->CurAuxBuffer = ctx->DrawBuffer->AuxBuffers[1];
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break;
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case DD_AUX2_BIT:
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ASSERT(buffer->Visual.numAuxBuffers >= 3);
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swrast->CurAuxBuffer = ctx->DrawBuffer->AuxBuffers[2];
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break;
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case DD_AUX3_BIT:
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ASSERT(buffer->Visual.numAuxBuffers >= 4);
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swrast->CurAuxBuffer = ctx->DrawBuffer->AuxBuffers[3];
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break;
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default:
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swrast->CurAuxBuffer = NULL;
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}
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swrast->Driver.WriteRGBASpan = write_rgba_span_aux;
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swrast->Driver.WriteRGBSpan = write_rgb_span_aux;
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swrast->Driver.WriteMonoRGBASpan = write_monorgba_span_aux;
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swrast->Driver.WriteRGBAPixels = write_rgba_pixels_aux;
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swrast->Driver.WriteMonoRGBAPixels = write_monorgba_pixels_aux;
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swrast->Driver.ReadRGBASpan = read_rgba_span_aux;
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swrast->Driver.ReadRGBAPixels = read_rgba_pixels_aux;
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}
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