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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5563 | serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. |
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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 TUNGSTEN GRAPHICS 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 "intel_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 | /** |
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| 38 | * Check if we're about to draw into the front color buffer. |
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| 39 | * If so, set the intel->front_buffer_dirty field to true. |
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| 40 | */ |
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| 41 | void |
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| 42 | intel_check_front_buffer_rendering(struct intel_context *intel) |
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| 43 | { |
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| 44 | const struct gl_framebuffer *fb = intel->ctx.DrawBuffer; |
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| 45 | if (_mesa_is_winsys_fbo(fb)) { |
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| 46 | /* drawing to window system buffer */ |
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| 47 | if (fb->_NumColorDrawBuffers > 0) { |
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| 48 | if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT) { |
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| 49 | intel->front_buffer_dirty = true; |
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| 50 | } |
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| 51 | } |
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| 52 | } |
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| 53 | } |
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| 54 | |||
| 55 | static void |
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| 56 | intelDrawBuffer(struct gl_context * ctx, GLenum mode) |
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| 57 | { |
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| 58 | if (ctx->DrawBuffer && _mesa_is_winsys_fbo(ctx->DrawBuffer)) { |
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| 59 | struct intel_context *const intel = intel_context(ctx); |
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| 60 | const bool was_front_buffer_rendering = |
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| 61 | intel->is_front_buffer_rendering; |
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| 62 | |||
| 63 | intel->is_front_buffer_rendering = (mode == GL_FRONT_LEFT) |
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| 64 | || (mode == GL_FRONT) || (mode == GL_FRONT_AND_BACK); |
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| 65 | |||
| 66 | /* If we weren't front-buffer rendering before but we are now, |
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| 67 | * invalidate our DRI drawable so we'll ask for new buffers |
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| 68 | * (including the fake front) before we start rendering again. |
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| 69 | */ |
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| 70 | if (!was_front_buffer_rendering && intel->is_front_buffer_rendering) |
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| 71 | dri2InvalidateDrawable(intel->driContext->driDrawablePriv); |
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| 72 | } |
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| 73 | |||
| 74 | intel_draw_buffer(ctx); |
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| 75 | } |
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| 76 | |||
| 77 | |||
| 78 | static void |
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| 79 | intelReadBuffer(struct gl_context * ctx, GLenum mode) |
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| 80 | { |
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| 81 | if (ctx->DrawBuffer && _mesa_is_winsys_fbo(ctx->DrawBuffer)) { |
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| 82 | struct intel_context *const intel = intel_context(ctx); |
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| 83 | const bool was_front_buffer_reading = |
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| 84 | intel->is_front_buffer_reading; |
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| 85 | |||
| 86 | intel->is_front_buffer_reading = (mode == GL_FRONT_LEFT) |
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| 87 | || (mode == GL_FRONT); |
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| 88 | |||
| 89 | /* If we weren't front-buffer reading before but we are now, |
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| 90 | * invalidate our DRI drawable so we'll ask for new buffers |
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| 91 | * (including the fake front) before we start reading again. |
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| 92 | */ |
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| 93 | if (!was_front_buffer_reading && intel->is_front_buffer_reading) |
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| 94 | dri2InvalidateDrawable(intel->driContext->driReadablePriv); |
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| 95 | } |
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| 96 | } |
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| 97 | |||
| 98 | |||
| 99 | void |
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| 100 | intelInitBufferFuncs(struct dd_function_table *functions) |
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| 101 | { |
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| 102 | functions->DrawBuffer = intelDrawBuffer; |
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| 103 | functions->ReadBuffer = intelReadBuffer; |
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| 104 | } |