/* Test the TGSI_SEMANTIC_POSITION fragment shader input.
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* Plus properties for upper-left vs. lower-left origin and
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* center integer vs. half-integer;
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*/
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#include <stdio.h>
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#include "graw_util.h"
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#include "util/macros.h"
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static int width = 300;
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static int height = 300;
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static struct graw_info info;
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struct vertex {
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float position[4];
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float color[4];
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};
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/* Note: the upper-left vertex is pushed to the left a bit to
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* make sure we can spot upside-down rendering.
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*/
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static struct vertex vertices[] =
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{
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{
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{-0.95, -0.95, 0.5, 1.0 },
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{ 0, 0, 0, 1 }
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},
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{
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{ 0.85, -0.95, 0.5, 1.0 },
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{ 0, 0, 0, 1 }
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},
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{
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{ 0.95, 0.95, 0.5, 1.0 },
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{ 0, 0, 0, 1 }
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},
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{
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{-0.95, 0.95, 0.5, 1.0 },
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{ 0, 0, 0, 1 }
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}
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};
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#define NUM_VERTS ARRAY_SIZE(vertices)
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static void
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set_vertices(void)
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{
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struct pipe_vertex_element ve[2];
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struct pipe_vertex_buffer vbuf;
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void *handle;
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memset(ve, 0, sizeof ve);
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ve[0].src_offset = Offset(struct vertex, position);
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ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
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ve[1].src_offset = Offset(struct vertex, color);
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ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
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handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
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info.ctx->bind_vertex_elements_state(info.ctx, handle);
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memset(&vbuf, 0, sizeof vbuf);
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vbuf.stride = sizeof(struct vertex);
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vbuf.buffer_offset = 0;
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vbuf.buffer.resource = pipe_buffer_create_with_data(info.ctx,
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PIPE_BIND_VERTEX_BUFFER,
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PIPE_USAGE_DEFAULT,
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sizeof(vertices),
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vertices);
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info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf);
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}
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static void
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set_vertex_shader(void)
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{
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void *handle;
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const char *text =
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"VERT\n"
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"DCL IN[0]\n"
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"DCL IN[1]\n"
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"DCL OUT[0], POSITION\n"
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"DCL OUT[1], GENERIC[0]\n"
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" 0: MOV OUT[0], IN[0]\n"
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" 1: MOV OUT[1], IN[1]\n"
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" 2: END\n";
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handle = graw_parse_vertex_shader(info.ctx, text);
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info.ctx->bind_vs_state(info.ctx, handle);
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}
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static void
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set_fragment_shader(int mode)
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{
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void *handle;
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const char *origin_upper_left_text =
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"FRAG\n"
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"PROPERTY FS_COORD_ORIGIN UPPER_LEFT\n" /* upper-left = black corner */
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"DCL IN[0], POSITION, LINEAR\n"
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"DCL OUT[0], COLOR\n"
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"DCL TEMP[0]\n"
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"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
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"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
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" 0: MOV TEMP[0], IN[0] \n"
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" 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
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" 2: MUL OUT[0], TEMP[0], IMM[0] \n"
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" 3: END\n";
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const char *origin_lower_left_text =
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"FRAG\n"
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"PROPERTY FS_COORD_ORIGIN LOWER_LEFT\n" /* lower-left = black corner */
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"DCL IN[0], POSITION, LINEAR\n"
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"DCL OUT[0], COLOR\n"
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"DCL TEMP[0]\n"
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"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
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"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
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" 0: MOV TEMP[0], IN[0] \n"
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" 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
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" 2: MUL OUT[0], TEMP[0], IMM[0] \n"
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" 3: END\n";
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/* Test fragcoord center integer vs. half integer */
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const char *center_integer_text =
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"FRAG\n"
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"PROPERTY FS_COORD_PIXEL_CENTER INTEGER \n" /* pixels are black */
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"DCL IN[0], POSITION, LINEAR \n"
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"DCL OUT[0], COLOR \n"
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"DCL TEMP[0] \n"
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"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
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"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
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"0: FRC TEMP[0], IN[0] \n"
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"1: MOV TEMP[0].zw, IMM[1].xxxx \n"
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"2: MOV OUT[0], TEMP[0] \n"
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"3: END \n";
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const char *center_half_integer_text =
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"FRAG\n"
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"PROPERTY FS_COORD_PIXEL_CENTER HALF_INTEGER \n" /* pixels are olive colored */
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"DCL IN[0], POSITION, LINEAR \n"
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"DCL OUT[0], COLOR \n"
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"DCL TEMP[0] \n"
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"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
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"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
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"0: FRC TEMP[0], IN[0] \n"
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"1: MOV TEMP[0].zw, IMM[1].xxxx \n"
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"2: MOV OUT[0], TEMP[0] \n"
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"3: END \n";
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const char *text;
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if (mode == 0)
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text = origin_upper_left_text;
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else if (mode == 1)
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text = origin_lower_left_text;
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else if (mode == 2)
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text = center_integer_text;
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else
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text = center_half_integer_text;
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handle = graw_parse_fragment_shader(info.ctx, text);
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info.ctx->bind_fs_state(info.ctx, handle);
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}
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static void
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draw(void)
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{
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union pipe_color_union clear_color;
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clear_color.f[0] = 0.25;
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clear_color.f[1] = 0.25;
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clear_color.f[2] = 0.25;
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clear_color.f[3] = 1.0;
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info.ctx->clear(info.ctx,
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PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
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&clear_color, 1.0, 0);
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util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
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info.ctx->flush(info.ctx, NULL, 0);
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#if 0
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/* At the moment, libgraw leaks out/makes available some of the
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* symbols from gallium/auxiliary, including these debug helpers.
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* Will eventually want to bless some of these paths, and lock the
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* others down so they aren't accessible from test programs.
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*
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* This currently just happens to work on debug builds - a release
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* build will probably fail to link here:
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*/
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debug_dump_surface_bmp(info.ctx, "result.bmp", surf);
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#endif
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graw_util_flush_front(&info);
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}
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#if 0
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static void
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resize(int w, int h)
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{
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width = w;
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height = h;
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set_viewport(0, 0, width, height, 30, 1000);
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}
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#endif
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static void
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init(int mode)
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{
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if (!graw_util_create_window(&info, width, height, 1, TRUE))
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exit(1);
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graw_util_default_state(&info, TRUE);
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graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0);
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set_vertices();
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set_vertex_shader();
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set_fragment_shader(mode);
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}
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int
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main(int argc, char *argv[])
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{
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int mode = argc > 1 ? atoi(argv[1]) : 0;
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switch (mode) {
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default:
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case 0:
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printf("frag coord origin upper-left (lower-left = black)\n");
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break;
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case 1:
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printf("frag coord origin lower-left (upper-left = black)\n");
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break;
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case 2:
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printf("frag coord center integer (all pixels black)\n");
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break;
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case 3:
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printf("frag coord center half-integer (all pixels olive color)\n");
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break;
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}
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init(mode);
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graw_set_display_func(draw);
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/*graw_set_reshape_func(resize);*/
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graw_main_loop();
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return 0;
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}
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