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/**************************************************************************
*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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 "intel_context.h"
#include "intel_buffers.h"
#include "intel_fbo.h"
#include "intel_mipmap_tree.h"
#include "main/framebuffer.h"
#include "main/renderbuffer.h"
/**
* Return pointer to current color drawing region, or NULL.
*/
struct intel_region *
intel_drawbuf_region(struct intel_context *intel)
{
struct intel_renderbuffer *irbColor =
intel_renderbuffer(intel->ctx.DrawBuffer->_ColorDrawBuffers[0]);
if (irbColor && irbColor->mt)
return irbColor->mt->region;
else
return NULL;
}
/**
* Return pointer to current color reading region, or NULL.
*/
struct intel_region *
intel_readbuf_region(struct intel_context *intel)
{
struct intel_renderbuffer *irb
= intel_renderbuffer(intel->ctx.ReadBuffer->_ColorReadBuffer);
if (irb && irb->mt)
return irb->mt->region;
else
return NULL;
}
/**
* Check if we're about to draw into the front color buffer.
* If so, set the intel->front_buffer_dirty field to true.
*/
void
intel_check_front_buffer_rendering(struct intel_context *intel)
{
const struct gl_framebuffer *fb = intel->ctx.DrawBuffer;
if (fb->Name == 0) {
/* drawing to window system buffer */
if (fb->_NumColorDrawBuffers > 0) {
if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT) {
intel->front_buffer_dirty = true;
}
}
}
}
static void
intelDrawBuffer(struct gl_context * ctx, GLenum mode)
{
if ((ctx->DrawBuffer != NULL) && (ctx->DrawBuffer->Name == 0)) {
struct intel_context *const intel = intel_context(ctx);
const bool was_front_buffer_rendering =
intel->is_front_buffer_rendering;
intel->is_front_buffer_rendering = (mode == GL_FRONT_LEFT)
|| (mode == GL_FRONT) || (mode == GL_FRONT_AND_BACK);
/* If we weren't front-buffer rendering before but we are now,
* invalidate our DRI drawable so we'll ask for new buffers
* (including the fake front) before we start rendering again.
*/
if (!was_front_buffer_rendering && intel->is_front_buffer_rendering)
dri2InvalidateDrawable(intel->driContext->driDrawablePriv);
}
intel_draw_buffer(ctx);
}
static void
intelReadBuffer(struct gl_context * ctx, GLenum mode)
{
if ((ctx->DrawBuffer != NULL) && (ctx->DrawBuffer->Name == 0)) {
struct intel_context *const intel = intel_context(ctx);
const bool was_front_buffer_reading =
intel->is_front_buffer_reading;
intel->is_front_buffer_reading = (mode == GL_FRONT_LEFT)
|| (mode == GL_FRONT);
/* If we weren't front-buffer reading before but we are now,
* invalidate our DRI drawable so we'll ask for new buffers
* (including the fake front) before we start reading again.
*/
if (!was_front_buffer_reading && intel->is_front_buffer_reading)
dri2InvalidateDrawable(intel->driContext->driReadablePriv);
}
}
void
intelInitBufferFuncs(struct dd_function_table *functions)
{
functions->DrawBuffer = intelDrawBuffer;
functions->ReadBuffer = intelReadBuffer;
}
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