| /************************************************************************** |
| * |
| * 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/fbobject.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 (_mesa_is_winsys_fbo(fb)) { |
| /* 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 && _mesa_is_winsys_fbo(ctx->DrawBuffer)) { |
| 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 && _mesa_is_winsys_fbo(ctx->DrawBuffer)) { |
| 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; |
| } |