| /* Display a cleared blue window. This demo has no dependencies on |
| * any utility code, just the graw interface and gallium. |
| */ |
| |
| #include <stdio.h> |
| #include "state_tracker/graw.h" |
| #include "pipe/p_screen.h" |
| #include "pipe/p_context.h" |
| #include "pipe/p_state.h" |
| #include "pipe/p_defines.h" |
| |
| #include "util/u_memory.h" /* Offset() */ |
| #include "util/u_draw_quad.h" |
| |
| enum pipe_format formats[] = { |
| PIPE_FORMAT_R8G8B8A8_UNORM, |
| PIPE_FORMAT_B8G8R8A8_UNORM, |
| PIPE_FORMAT_NONE |
| }; |
| |
| static const int WIDTH = 300; |
| static const int HEIGHT = 300; |
| |
| static struct pipe_screen *screen = NULL; |
| static struct pipe_context *ctx = NULL; |
| static struct pipe_surface *surf = NULL; |
| static struct pipe_resource *tex = NULL; |
| static void *window = NULL; |
| |
| struct vertex { |
| float position[4]; |
| float color[4]; |
| }; |
| |
| static struct vertex vertices[4] = |
| { |
| { { 0.0f, -0.9f, 0.0f, 1.0f }, |
| { 1.0f, 0.0f, 0.0f, 1.0f } |
| }, |
| { { -0.9f, 0.9f, 0.0f, 1.0f }, |
| { 0.0f, 1.0f, 0.0f, 1.0f } |
| }, |
| { { 0.9f, 0.9f, 0.0f, 1.0f }, |
| { 0.0f, 0.0f, 1.0f, 1.0f } |
| } |
| }; |
| |
| |
| |
| |
| static void set_viewport( float x, float y, |
| float width, float height, |
| float near, float far) |
| { |
| float z = far; |
| float half_width = (float)width / 2.0f; |
| float half_height = (float)height / 2.0f; |
| float half_depth = ((float)far - (float)near) / 2.0f; |
| struct pipe_viewport_state vp; |
| |
| vp.scale[0] = half_width; |
| vp.scale[1] = half_height; |
| vp.scale[2] = half_depth; |
| vp.scale[3] = 1.0f; |
| |
| vp.translate[0] = half_width + x; |
| vp.translate[1] = half_height + y; |
| vp.translate[2] = half_depth + z; |
| vp.translate[3] = 0.0f; |
| |
| ctx->set_viewport_state( ctx, &vp ); |
| } |
| |
| 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 = ctx->create_vertex_elements_state(ctx, 2, ve); |
| ctx->bind_vertex_elements_state(ctx, handle); |
| |
| |
| vbuf.stride = sizeof( struct vertex ); |
| vbuf.buffer_offset = 0; |
| vbuf.buffer = screen->user_buffer_create(screen, |
| vertices, |
| sizeof(vertices), |
| PIPE_BIND_VERTEX_BUFFER); |
| |
| ctx->set_vertex_buffers(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], COLOR\n" |
| " 0: MOV OUT[1], IN[1]\n" |
| " 1: MOV OUT[0], IN[0]\n" |
| " 2: END\n"; |
| |
| handle = graw_parse_vertex_shader(ctx, text); |
| ctx->bind_vs_state(ctx, handle); |
| } |
| |
| static void set_fragment_shader( void ) |
| { |
| void *handle; |
| const char *text = |
| "FRAG\n" |
| "DCL IN[0], COLOR, LINEAR\n" |
| "DCL OUT[0], COLOR\n" |
| " 0: MOV OUT[0], IN[0]\n" |
| " 1: END\n"; |
| |
| handle = graw_parse_fragment_shader(ctx, text); |
| ctx->bind_fs_state(ctx, handle); |
| } |
| |
| |
| static void set_geometry_shader( void ) |
| { |
| void *handle; |
| const char *text = |
| "GEOM\n" |
| "PROPERTY GS_INPUT_PRIMITIVE TRIANGLES\n" |
| "PROPERTY GS_OUTPUT_PRIMITIVE TRIANGLE_STRIP\n" |
| "DCL IN[][0], POSITION, CONSTANT\n" |
| "DCL IN[][1], COLOR, CONSTANT\n" |
| "DCL OUT[0], POSITION, CONSTANT\n" |
| "DCL OUT[1], COLOR, CONSTANT\n" |
| "0:MOV OUT[0], IN[0][0]\n" |
| "1:MOV OUT[1], IN[0][1]\n" |
| "2:EMIT\n" |
| "3:MOV OUT[0], IN[1][0]\n" |
| "4:MOV OUT[1], IN[0][1]\n" /* copy color from input vertex 0 */ |
| "5:EMIT\n" |
| "6:MOV OUT[0], IN[2][0]\n" |
| "7:MOV OUT[1], IN[2][1]\n" |
| "8:EMIT\n" |
| "9:ENDPRIM\n" |
| "10:END\n"; |
| |
| handle = graw_parse_geometry_shader(ctx, text); |
| ctx->bind_gs_state(ctx, handle); |
| } |
| |
| static void draw( void ) |
| { |
| union pipe_color_union clear_color = { .f = {1,0,1,1} }; |
| |
| ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0); |
| util_draw_arrays(ctx, PIPE_PRIM_TRIANGLES, 0, 3); |
| ctx->flush(ctx, NULL); |
| |
| screen->flush_frontbuffer(screen, tex, 0, 0, window); |
| } |
| |
| |
| static void init( void ) |
| { |
| struct pipe_framebuffer_state fb; |
| struct pipe_resource templat; |
| struct pipe_surface surf_tmpl; |
| int i; |
| |
| /* It's hard to say whether window or screen should be created |
| * first. Different environments would prefer one or the other. |
| * |
| * Also, no easy way of querying supported formats if the screen |
| * cannot be created first. |
| */ |
| for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) { |
| screen = graw_create_window_and_screen(0, 0, 300, 300, |
| formats[i], |
| &window); |
| if (window && screen) |
| break; |
| } |
| if (!screen || !window) { |
| fprintf(stderr, "Unable to create window\n"); |
| exit(1); |
| } |
| |
| ctx = screen->context_create(screen, NULL); |
| if (ctx == NULL) |
| exit(3); |
| |
| templat.target = PIPE_TEXTURE_2D; |
| templat.format = formats[i]; |
| templat.width0 = WIDTH; |
| templat.height0 = HEIGHT; |
| templat.depth0 = 1; |
| templat.array_size = 1; |
| templat.last_level = 0; |
| templat.nr_samples = 1; |
| templat.bind = (PIPE_BIND_RENDER_TARGET | |
| PIPE_BIND_DISPLAY_TARGET); |
| |
| tex = screen->resource_create(screen, |
| &templat); |
| if (tex == NULL) |
| exit(4); |
| |
| surf_tmpl.format = templat.format; |
| surf_tmpl.usage = PIPE_BIND_RENDER_TARGET; |
| surf_tmpl.u.tex.level = 0; |
| surf_tmpl.u.tex.first_layer = 0; |
| surf_tmpl.u.tex.last_layer = 0; |
| surf = ctx->create_surface(ctx, tex, &surf_tmpl); |
| if (surf == NULL) |
| exit(5); |
| |
| memset(&fb, 0, sizeof fb); |
| fb.nr_cbufs = 1; |
| fb.width = WIDTH; |
| fb.height = HEIGHT; |
| fb.cbufs[0] = surf; |
| |
| ctx->set_framebuffer_state(ctx, &fb); |
| |
| { |
| struct pipe_blend_state blend; |
| void *handle; |
| memset(&blend, 0, sizeof blend); |
| blend.rt[0].colormask = PIPE_MASK_RGBA; |
| handle = ctx->create_blend_state(ctx, &blend); |
| ctx->bind_blend_state(ctx, handle); |
| } |
| |
| { |
| struct pipe_depth_stencil_alpha_state depthstencil; |
| void *handle; |
| memset(&depthstencil, 0, sizeof depthstencil); |
| handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil); |
| ctx->bind_depth_stencil_alpha_state(ctx, handle); |
| } |
| |
| { |
| struct pipe_rasterizer_state rasterizer; |
| void *handle; |
| memset(&rasterizer, 0, sizeof rasterizer); |
| rasterizer.cull_face = PIPE_FACE_NONE; |
| rasterizer.gl_rasterization_rules = 1; |
| handle = ctx->create_rasterizer_state(ctx, &rasterizer); |
| ctx->bind_rasterizer_state(ctx, handle); |
| } |
| |
| set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000); |
| set_vertices(); |
| set_vertex_shader(); |
| set_fragment_shader(); |
| set_geometry_shader(); |
| } |
| |
| |
| int main( int argc, char *argv[] ) |
| { |
| init(); |
| |
| graw_set_display_func( draw ); |
| graw_main_loop(); |
| return 0; |
| } |