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      1 /**************************************************************************
      2 
      3 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
      4 Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
      5                      VA Linux Systems Inc., Fremont, California.
      6 
      7 The Weather Channel (TM) funded Tungsten Graphics to develop the
      8 initial release of the Radeon 8500 driver under the XFree86 license.
      9 This notice must be preserved.
     10 
     11 All Rights Reserved.
     12 
     13 Permission is hereby granted, free of charge, to any person obtaining
     14 a copy of this software and associated documentation files (the
     15 "Software"), to deal in the Software without restriction, including
     16 without limitation the rights to use, copy, modify, merge, publish,
     17 distribute, sublicense, and/or sell copies of the Software, and to
     18 permit persons to whom the Software is furnished to do so, subject to
     19 the following conditions:
     20 
     21 The above copyright notice and this permission notice (including the
     22 next paragraph) shall be included in all copies or substantial
     23 portions of the Software.
     24 
     25 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     26 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     27 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     28 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
     29 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     30 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     31 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     32 
     33 **************************************************************************/
     34 
     35 /*
     36  * Authors:
     37  *   Kevin E. Martin <martin (at) valinux.com>
     38  *   Gareth Hughes <gareth (at) valinux.com>
     39  *   Keith Whitwell <keith (at) tungstengraphics.com>
     40  *
     41  */
     42 
     43 #include "main/glheader.h"
     44 #include "main/texformat.h"
     45 #include "main/renderbuffer.h"
     46 #include "main/samplerobj.h"
     47 #include "swrast/swrast.h"
     48 #include "swrast/s_renderbuffer.h"
     49 
     50 #include "radeon_common.h"
     51 #include "radeon_span.h"
     52 
     53 
     54 static void
     55 radeon_renderbuffer_map(struct gl_context *ctx, struct gl_renderbuffer *rb)
     56 {
     57 	struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
     58 	GLubyte *map;
     59 	int stride;
     60 
     61 	if (!rb || !rrb)
     62 		return;
     63 
     64 	ctx->Driver.MapRenderbuffer(ctx, rb, 0, 0, rb->Width, rb->Height,
     65 				    GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
     66 				    &map, &stride);
     67 
     68 	rrb->base.Map = map;
     69 	rrb->base.RowStride = stride;
     70 	/* No floating point color buffers, use GLubytes */
     71 	rrb->base.ColorType = GL_UNSIGNED_BYTE;
     72 }
     73 
     74 static void
     75 radeon_renderbuffer_unmap(struct gl_context *ctx, struct gl_renderbuffer *rb)
     76 {
     77 	struct radeon_renderbuffer *rrb = radeon_renderbuffer(rb);
     78 	if (!rb || !rrb)
     79 		return;
     80 
     81 	ctx->Driver.UnmapRenderbuffer(ctx, rb);
     82 
     83 	rrb->base.Map = NULL;
     84 	rrb->base.RowStride = 0;
     85 }
     86 
     87 static void
     88 radeon_map_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
     89 {
     90 	GLuint i;
     91 
     92 	radeon_print(RADEON_MEMORY, RADEON_TRACE,
     93 		"%s( %p , fb %p )\n",
     94 		     __func__, ctx, fb);
     95 
     96 	/* check for render to textures */
     97 	for (i = 0; i < BUFFER_COUNT; i++)
     98 		radeon_renderbuffer_map(ctx, fb->Attachment[i].Renderbuffer);
     99 
    100 	radeon_check_front_buffer_rendering(ctx);
    101 }
    102 
    103 static void
    104 radeon_unmap_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
    105 {
    106 	GLuint i;
    107 
    108 	radeon_print(RADEON_MEMORY, RADEON_TRACE,
    109 		"%s( %p , fb %p)\n",
    110 		     __func__, ctx, fb);
    111 
    112 	/* check for render to textures */
    113 	for (i = 0; i < BUFFER_COUNT; i++)
    114 		radeon_renderbuffer_unmap(ctx, fb->Attachment[i].Renderbuffer);
    115 
    116 	radeon_check_front_buffer_rendering(ctx);
    117 }
    118 
    119 static void radeonSpanRenderStart(struct gl_context * ctx)
    120 {
    121 	radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
    122 	int i;
    123 
    124 	radeon_firevertices(rmesa);
    125 
    126 	for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
    127 		if (ctx->Texture.Unit[i]._ReallyEnabled) {
    128 			radeon_validate_texture_miptree(ctx, _mesa_get_samplerobj(ctx, i),
    129 							ctx->Texture.Unit[i]._Current);
    130 			radeon_swrast_map_texture_images(ctx, ctx->Texture.Unit[i]._Current);
    131 		}
    132 	}
    133 
    134 	radeon_map_framebuffer(ctx, ctx->DrawBuffer);
    135 	if (ctx->ReadBuffer != ctx->DrawBuffer)
    136 		radeon_map_framebuffer(ctx, ctx->ReadBuffer);
    137 }
    138 
    139 static void radeonSpanRenderFinish(struct gl_context * ctx)
    140 {
    141 	int i;
    142 
    143 	_swrast_flush(ctx);
    144 
    145 	for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++)
    146 		if (ctx->Texture.Unit[i]._ReallyEnabled)
    147 			radeon_swrast_unmap_texture_images(ctx, ctx->Texture.Unit[i]._Current);
    148 
    149 	radeon_unmap_framebuffer(ctx, ctx->DrawBuffer);
    150 	if (ctx->ReadBuffer != ctx->DrawBuffer)
    151 		radeon_unmap_framebuffer(ctx, ctx->ReadBuffer);
    152 }
    153 
    154 void radeonInitSpanFuncs(struct gl_context * ctx)
    155 {
    156 	struct swrast_device_driver *swdd =
    157 	    _swrast_GetDeviceDriverReference(ctx);
    158 	swdd->SpanRenderStart = radeonSpanRenderStart;
    159 	swdd->SpanRenderFinish = radeonSpanRenderFinish;
    160 }
    161 
    162