| /* Test texture swizzles */ |
| |
| #include <stdio.h> |
| |
| #include "graw_util.h" |
| |
| |
| static struct graw_info info; |
| |
| static struct pipe_resource *texture = NULL; |
| static struct pipe_sampler_view *sv = NULL; |
| static void *sampler = NULL; |
| |
| static const int WIDTH = 300; |
| static const int HEIGHT = 300; |
| |
| struct vertex { |
| float position[4]; |
| float color[4]; |
| }; |
| |
| static struct vertex vertices[] = |
| { |
| { { 0.9, -0.9, 0.0, 1.0 }, |
| { 1, 0, 0, 1 } }, |
| |
| { { 0.9, 0.9, 0.0, 1.0 }, |
| { 1, 1, 0, 1 } }, |
| |
| { {-0.9, 0.9, 0.0, 1.0 }, |
| { 0, 1, 0, 1 } }, |
| |
| { {-0.9, -0.9, 0.0, 1.0 }, |
| { 0, 0, 0, 1 } }, |
| }; |
| |
| |
| static void set_vertices(void) |
| { |
| struct pipe_vertex_element ve[2]; |
| struct pipe_vertex_buffer vbuf; |
| void *handle; |
| |
| memset(ve, 0, sizeof ve); |
| |
| ve[0].src_offset = Offset(struct vertex, position); |
| ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
| ve[1].src_offset = Offset(struct vertex, color); |
| ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
| |
| handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve); |
| info.ctx->bind_vertex_elements_state(info.ctx, handle); |
| |
| |
| vbuf.stride = sizeof(struct vertex); |
| vbuf.buffer_offset = 0; |
| vbuf.buffer = pipe_buffer_create_with_data(info.ctx, |
| PIPE_BIND_VERTEX_BUFFER, |
| PIPE_USAGE_STATIC, |
| sizeof(vertices), |
| vertices); |
| |
| info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf); |
| } |
| |
| static void set_vertex_shader(void) |
| { |
| void *handle; |
| const char *text = |
| "VERT\n" |
| "DCL IN[0]\n" |
| "DCL IN[1]\n" |
| "DCL OUT[0], POSITION\n" |
| "DCL OUT[1], GENERIC[0]\n" |
| " 0: MOV OUT[1], IN[1]\n" |
| " 1: MOV OUT[0], IN[0]\n" |
| " 2: END\n"; |
| |
| handle = graw_parse_vertex_shader(info.ctx, text); |
| info.ctx->bind_vs_state(info.ctx, handle); |
| } |
| |
| static void set_fragment_shader(void) |
| { |
| void *handle; |
| const char *text = |
| "FRAG\n" |
| "DCL IN[0], GENERIC[0], PERSPECTIVE\n" |
| "DCL OUT[0], COLOR\n" |
| "DCL SAMP[0]\n" |
| " 0: TXP OUT[0], IN[0], SAMP[0], 2D\n" |
| " 2: END\n"; |
| |
| handle = graw_parse_fragment_shader(info.ctx, text); |
| info.ctx->bind_fs_state(info.ctx, handle); |
| } |
| |
| |
| static void draw(void) |
| { |
| union pipe_color_union clear_color; |
| |
| clear_color.f[0] = 0.5; |
| clear_color.f[1] = 0.5; |
| clear_color.f[2] = 0.5; |
| clear_color.f[3] = 1.0; |
| |
| info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0); |
| util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4); |
| info.ctx->flush(info.ctx, NULL); |
| |
| graw_util_flush_front(&info); |
| } |
| |
| |
| |
| static void |
| init_tex(const unsigned swizzle[4]) |
| { |
| #define SIZE 256 |
| struct pipe_sampler_view sv_template; |
| ubyte tex2d[SIZE][SIZE][4]; |
| int s, t; |
| |
| for (s = 0; s < SIZE; s++) { |
| for (t = 0; t < SIZE; t++) { |
| tex2d[t][s][0] = 0; /*B*/ |
| tex2d[t][s][1] = t; /*G*/ |
| tex2d[t][s][2] = s; /*R*/ |
| tex2d[t][s][3] = 1; /*A*/ |
| } |
| } |
| |
| texture = graw_util_create_tex2d(&info, SIZE, SIZE, |
| PIPE_FORMAT_B8G8R8A8_UNORM, tex2d); |
| |
| memset(&sv_template, 0, sizeof sv_template); |
| sv_template.format = texture->format; |
| sv_template.texture = texture; |
| sv_template.swizzle_r = swizzle[0]; |
| sv_template.swizzle_g = swizzle[1]; |
| sv_template.swizzle_b = swizzle[2]; |
| sv_template.swizzle_a = swizzle[3]; |
| sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_template); |
| if (sv == NULL) |
| exit(5); |
| |
| info.ctx->set_fragment_sampler_views(info.ctx, 1, &sv); |
| |
| sampler = graw_util_create_simple_sampler(&info, |
| PIPE_TEX_WRAP_REPEAT, |
| PIPE_TEX_FILTER_NEAREST); |
| |
| info.ctx->bind_fragment_sampler_states(info.ctx, 1, &sampler); |
| #undef SIZE |
| } |
| |
| |
| static void |
| init(const unsigned swizzle[4]) |
| { |
| if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE)) |
| exit(1); |
| |
| graw_util_default_state(&info, FALSE); |
| |
| graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 10000); |
| |
| init_tex(swizzle); |
| |
| set_vertices(); |
| set_vertex_shader(); |
| set_fragment_shader(); |
| } |
| |
| |
| static unsigned |
| char_to_swizzle(char c) |
| { |
| switch (c) { |
| case 'r': |
| return PIPE_SWIZZLE_RED; |
| case 'g': |
| return PIPE_SWIZZLE_GREEN; |
| case 'b': |
| return PIPE_SWIZZLE_BLUE; |
| case 'a': |
| return PIPE_SWIZZLE_ALPHA; |
| case '0': |
| return PIPE_SWIZZLE_ZERO; |
| case '1': |
| return PIPE_SWIZZLE_ONE; |
| default: |
| return PIPE_SWIZZLE_RED; |
| } |
| } |
| |
| |
| int main(int argc, char *argv[]) |
| { |
| const char swizzle_names[] = "rgba01"; |
| uint swizzle[4]; |
| int i; |
| |
| swizzle[0] = PIPE_SWIZZLE_RED; |
| swizzle[1] = PIPE_SWIZZLE_GREEN; |
| swizzle[2] = PIPE_SWIZZLE_BLUE; |
| swizzle[3] = PIPE_SWIZZLE_ALPHA; |
| |
| for (i = 1; i < argc; i++) { |
| swizzle[i-1] = char_to_swizzle(argv[i][0]); |
| } |
| |
| printf("Example:\n"); |
| printf(" tex-swizzle r 0 g 1\n"); |
| printf("Current swizzle = "); |
| for (i = 0; i < 4; i++) { |
| printf("%c", swizzle_names[swizzle[i]]); |
| } |
| printf("\n"); |
| |
| init(swizzle); |
| |
| graw_set_display_func(draw); |
| graw_main_loop(); |
| return 0; |
| } |