/* 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); memset(&vbuf, 0, sizeof vbuf); vbuf.stride = sizeof(struct vertex); vbuf.buffer_offset = 0; vbuf.buffer = pipe_buffer_create_with_data(info.ctx, PIPE_BIND_VERTEX_BUFFER, PIPE_USAGE_DEFAULT, sizeof(vertices), vertices); info.ctx->set_vertex_buffers(info.ctx, 0, 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" "DCL SVIEW[0], 2D, FLOAT\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, 0); 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_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv); sampler = graw_util_create_simple_sampler(&info, PIPE_TEX_WRAP_REPEAT, PIPE_TEX_FILTER_NEAREST); info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT, 0, 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_X; case 'g': return PIPE_SWIZZLE_Y; case 'b': return PIPE_SWIZZLE_Z; case 'a': return PIPE_SWIZZLE_W; case '0': return PIPE_SWIZZLE_0; case '1': return PIPE_SWIZZLE_1; default: return PIPE_SWIZZLE_X; } } int main(int argc, char *argv[]) { const char swizzle_names[] = "rgba01"; uint swizzle[4]; int i; swizzle[0] = PIPE_SWIZZLE_X; swizzle[1] = PIPE_SWIZZLE_Y; swizzle[2] = PIPE_SWIZZLE_Z; swizzle[3] = PIPE_SWIZZLE_W; 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; }