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| 5564 | serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2003 VMware, Inc. |
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| 4 | * All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the |
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| 8 | * "Software"), to deal in the Software without restriction, including |
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| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 11 | * permit persons to whom the Software is furnished to do so, subject to |
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| 12 | * the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice (including the |
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| 15 | * next paragraph) shall be included in all copies or substantial portions |
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| 16 | * of the Software. |
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| 17 | * |
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| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 21 | * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | * |
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| 26 | **************************************************************************/ |
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| 27 | |||
| 28 | #include "brw_context.h" |
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| 29 | #include "intel_buffers.h" |
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| 30 | #include "intel_fbo.h" |
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| 31 | #include "intel_mipmap_tree.h" |
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| 32 | |||
| 33 | #include "main/fbobject.h" |
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| 34 | #include "main/framebuffer.h" |
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| 35 | #include "main/renderbuffer.h" |
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| 36 | |||
| 37 | |||
| 38 | bool |
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| 39 | brw_is_front_buffer_reading(struct gl_framebuffer *fb) |
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| 40 | { |
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| 41 | if (!fb || _mesa_is_user_fbo(fb)) |
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| 42 | return false; |
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| 43 | |||
| 44 | return fb->_ColorReadBufferIndex == BUFFER_FRONT_LEFT; |
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| 45 | } |
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| 46 | |||
| 47 | bool |
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| 48 | brw_is_front_buffer_drawing(struct gl_framebuffer *fb) |
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| 49 | { |
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| 50 | if (!fb || _mesa_is_user_fbo(fb)) |
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| 51 | return false; |
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| 52 | |||
| 53 | return (fb->_NumColorDrawBuffers >= 1 && |
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| 54 | fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT); |
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| 55 | } |
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| 56 | |||
| 57 | static void |
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| 58 | intelDrawBuffer(struct gl_context * ctx, GLenum mode) |
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| 59 | { |
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| 60 | if (brw_is_front_buffer_drawing(ctx->DrawBuffer)) { |
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| 61 | struct brw_context *const brw = brw_context(ctx); |
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| 62 | |||
| 63 | /* If we might be front-buffer rendering on this buffer for the first |
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| 64 | * time, invalidate our DRI drawable so we'll ask for new buffers |
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| 65 | * (including the fake front) before we start rendering again. |
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| 66 | */ |
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| 67 | dri2InvalidateDrawable(brw->driContext->driDrawablePriv); |
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| 68 | intel_prepare_render(brw); |
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| 69 | } |
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| 70 | } |
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| 71 | |||
| 72 | |||
| 73 | static void |
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| 74 | intelReadBuffer(struct gl_context * ctx, GLenum mode) |
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| 75 | { |
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| 76 | if (brw_is_front_buffer_reading(ctx->ReadBuffer)) { |
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| 77 | struct brw_context *const brw = brw_context(ctx); |
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| 78 | |||
| 79 | /* If we might be front-buffer reading on this buffer for the first |
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| 80 | * time, invalidate our DRI drawable so we'll ask for new buffers |
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| 81 | * (including the fake front) before we start reading again. |
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| 82 | */ |
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| 83 | dri2InvalidateDrawable(brw->driContext->driReadablePriv); |
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| 84 | intel_prepare_render(brw); |
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| 85 | } |
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| 86 | } |
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| 87 | |||
| 88 | |||
| 89 | void |
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| 90 | intelInitBufferFuncs(struct dd_function_table *functions) |
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| 91 | { |
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| 92 | functions->DrawBuffer = intelDrawBuffer; |
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| 93 | functions->ReadBuffer = intelReadBuffer; |
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| 94 | } |