diff options
| -rw-r--r-- | src/gallium/auxiliary/util/u_draw_quad.c | 112 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_draw_quad.h | 37 |
2 files changed, 149 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_draw_quad.c b/src/gallium/auxiliary/util/u_draw_quad.c new file mode 100644 index 00000000000..79a69de633d --- /dev/null +++ b/src/gallium/auxiliary/util/u_draw_quad.c @@ -0,0 +1,112 @@ +/************************************************************************** + * + * Copyright 2008 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 "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "pipe/p_inlines.h" +#include "pipe/p_winsys.h" +#include "util/u_draw_quad.h" + + +/** + * Draw screen-aligned textured quad. + */ +void +util_draw_texquad(struct pipe_context *pipe, + float x0, float y0, float x1, float y1, float z) +{ + struct pipe_buffer *vbuf; + struct pipe_vertex_buffer vbuffer; + struct pipe_vertex_element velement; + uint numAttribs = 2, vertexBytes, i, j; + float *v; + + vertexBytes = 4 * (4 * numAttribs * sizeof(float)); + + /* XXX create one-time */ + vbuf = pipe->winsys->buffer_create(pipe->winsys, 32, + PIPE_BUFFER_USAGE_VERTEX, vertexBytes); + assert(vbuf); + + v = (float *) pipe->winsys->buffer_map(pipe->winsys, vbuf, + PIPE_BUFFER_USAGE_CPU_WRITE); + + /* + * Load vertex buffer + */ + for (i = j = 0; i < 4; i++) { + v[j + 2] = z; /* z */ + v[j + 3] = 1.0; /* w */ + v[j + 6] = 0.0; /* r */ + v[j + 7] = 1.0; /* q */ + j += 8; + } + + v[0] = x0; + v[1] = y0; + v[4] = 0.0; /*s*/ + v[5] = 0.0; /*t*/ + + v[8] = x1; + v[9] = y0; + v[12] = 1.0; + v[13] = 0.0; + + v[16] = x1; + v[17] = y1; + v[20] = 1.0; + v[21] = 1.0; + + v[24] = x0; + v[25] = y1; + v[28] = 0.0; + v[29] = 1.0; + + pipe->winsys->buffer_unmap(pipe->winsys, vbuf); + + /* tell pipe about the vertex buffer */ + vbuffer.buffer = vbuf; + vbuffer.pitch = numAttribs * 4 * sizeof(float); /* vertex size */ + vbuffer.buffer_offset = 0; + pipe->set_vertex_buffer(pipe, 0, &vbuffer); + + /* tell pipe about the vertex attributes */ + for (i = 0; i < numAttribs; i++) { + velement.src_offset = i * 4 * sizeof(float); + velement.vertex_buffer_index = 0; + velement.src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; + velement.nr_components = 4; + pipe->set_vertex_element(pipe, i, &velement); + } + + /* draw */ + pipe->draw_arrays(pipe, PIPE_PRIM_TRIANGLE_FAN, 0, 4); + + /* XXX: do one-time */ + pipe_buffer_reference(pipe->winsys, &vbuf, NULL); +} diff --git a/src/gallium/auxiliary/util/u_draw_quad.h b/src/gallium/auxiliary/util/u_draw_quad.h new file mode 100644 index 00000000000..a97f55d2efd --- /dev/null +++ b/src/gallium/auxiliary/util/u_draw_quad.h @@ -0,0 +1,37 @@ +/************************************************************************** + * + * Copyright 2008 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. + * + **************************************************************************/ + +#ifndef U_DRAWQUAD_H +#define U_DRAWQUAD_H + + +extern void +util_draw_texquad(struct pipe_context *pipe, + float x0, float y0, float x1, float y1, float z); + + +#endif |