gallium: new util_draw_texquad() function.
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/**************************************************************************
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*
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* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "pipe/p_context.h"
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#include "pipe/p_defines.h"
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#include "pipe/p_inlines.h"
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#include "pipe/p_winsys.h"
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#include "util/u_draw_quad.h"
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/**
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* Draw screen-aligned textured quad.
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*/
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void
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util_draw_texquad(struct pipe_context *pipe,
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float x0, float y0, float x1, float y1, float z)
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{
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struct pipe_buffer *vbuf;
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struct pipe_vertex_buffer vbuffer;
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struct pipe_vertex_element velement;
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uint numAttribs = 2, vertexBytes, i, j;
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float *v;
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vertexBytes = 4 * (4 * numAttribs * sizeof(float));
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/* XXX create one-time */
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vbuf = pipe->winsys->buffer_create(pipe->winsys, 32,
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PIPE_BUFFER_USAGE_VERTEX, vertexBytes);
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assert(vbuf);
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v = (float *) pipe->winsys->buffer_map(pipe->winsys, vbuf,
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PIPE_BUFFER_USAGE_CPU_WRITE);
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/*
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* Load vertex buffer
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*/
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for (i = j = 0; i < 4; i++) {
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v[j + 2] = z; /* z */
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v[j + 3] = 1.0; /* w */
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v[j + 6] = 0.0; /* r */
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v[j + 7] = 1.0; /* q */
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j += 8;
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}
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v[0] = x0;
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v[1] = y0;
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v[4] = 0.0; /*s*/
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v[5] = 0.0; /*t*/
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v[8] = x1;
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v[9] = y0;
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v[12] = 1.0;
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v[13] = 0.0;
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v[16] = x1;
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v[17] = y1;
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v[20] = 1.0;
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v[21] = 1.0;
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v[24] = x0;
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v[25] = y1;
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v[28] = 0.0;
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v[29] = 1.0;
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pipe->winsys->buffer_unmap(pipe->winsys, vbuf);
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/* tell pipe about the vertex buffer */
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vbuffer.buffer = vbuf;
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vbuffer.pitch = numAttribs * 4 * sizeof(float); /* vertex size */
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vbuffer.buffer_offset = 0;
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pipe->set_vertex_buffer(pipe, 0, &vbuffer);
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/* tell pipe about the vertex attributes */
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for (i = 0; i < numAttribs; i++) {
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velement.src_offset = i * 4 * sizeof(float);
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velement.vertex_buffer_index = 0;
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velement.src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
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velement.nr_components = 4;
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pipe->set_vertex_element(pipe, i, &velement);
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}
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/* draw */
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pipe->draw_arrays(pipe, PIPE_PRIM_TRIANGLE_FAN, 0, 4);
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/* XXX: do one-time */
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pipe_buffer_reference(pipe->winsys, &vbuf, NULL);
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}
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@ -0,0 +1,37 @@
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/**************************************************************************
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*
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* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
|
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
|
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef U_DRAWQUAD_H
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#define U_DRAWQUAD_H
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extern void
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util_draw_texquad(struct pipe_context *pipe,
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float x0, float y0, float x1, float y1, float z);
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#endif
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