/* Display a cleared blue window. This demo has no dependencies on
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* any utility code, just the graw interface and gallium.
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*/
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#include "state_tracker/graw.h"
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#include "pipe/p_screen.h"
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#include "pipe/p_context.h"
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#include "pipe/p_shader_tokens.h"
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#include "pipe/p_state.h"
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#include "pipe/p_defines.h"
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#include <stdio.h> /* for fread(), etc */
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#include "util/u_inlines.h"
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#include "util/u_memory.h" /* Offset() */
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#include "util/u_draw_quad.h"
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#include "util/u_box.h"
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static const char *filename = NULL;
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unsigned show_fps = 0;
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static void usage(char *name)
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{
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fprintf(stderr, "usage: %s [ options ] shader_filename\n", name);
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#ifndef _WIN32
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fprintf(stderr, "\n" );
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fprintf(stderr, "options:\n");
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fprintf(stderr, " -fps show frames per second\n");
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#endif
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}
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enum pipe_format formats[] = {
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PIPE_FORMAT_RGBA8888_UNORM,
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PIPE_FORMAT_BGRA8888_UNORM,
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PIPE_FORMAT_NONE
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};
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static const int WIDTH = 250;
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static const int HEIGHT = 250;
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static struct pipe_screen *screen = NULL;
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static struct pipe_context *ctx = NULL;
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static struct pipe_resource *rttex = NULL;
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static struct pipe_surface *surf = NULL;
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static struct pipe_sampler_view *sv = NULL;
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static void *sampler = NULL;
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static void *window = NULL;
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static struct pipe_resource *samptex = NULL;
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struct vertex {
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float position[4];
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float color[4];
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float texcoord[4];
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};
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/* Vertex data matches progs/fp/fp-tri.c, but flipped in Y dimension
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* so that the final images are the same.
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*/
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static struct vertex vertices[] =
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{
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{ { 0.9, 0.9, 0.0, 1.0 },
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{ 0, 0, 1, 1 },
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{ 1, 1, 0, 1 } },
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{ { 0.9, -0.9, 0.0, 1.0 },
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{ 1, 0, 0, 1 },
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{ 1, -1, 0, 1 } },
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{ {-0.9, 0.0, 0.0, 1.0 },
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{ 0, 1, 0, 1 },
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{ -1, 0, 0, 1 } },
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};
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static float constants1[] =
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{ 0.4, 0, 0, 1,
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1, 1, 1, 1,
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2, 2, 2, 2,
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4, 8, 16, 32,
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3, 0, 0, 0,
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0, .5, 0, 0,
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1, 0, 0, 1,
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0, 0, 0, 1,
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1, 0, 0, 0.5,
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0, 1, 0, 0.5,
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0, 0, 1, 0,
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0, 0, 0, 1,
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};
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static float constants2[] =
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{ 1, 0, 0, 1,
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0, 1, 0, 1,
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0, 0, 1, 1,
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0, 0, 0, 0,
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1, 1, 0, 1,
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1, .5, 0, 1,
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1, 0, 0, 1,
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0, 0, 0, 1,
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1, 0, 0, 0.5,
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0, 1, 0, 0.5,
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0, 0, 1, 0,
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0, 0, 0, 1,
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};
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static void init_fs_constbuf( void )
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{
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struct pipe_constant_buffer cb1;
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struct pipe_constant_buffer cb2;
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memset(&cb1, 0, sizeof cb1);
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cb1.buffer_size = sizeof constants1;
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cb1.user_buffer = constants1;
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ctx->set_constant_buffer(ctx,
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PIPE_SHADER_FRAGMENT, 0,
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&cb1);
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memset(&cb2, 0, sizeof cb2);
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cb2.buffer_size = sizeof constants2;
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cb2.user_buffer = constants2;
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ctx->set_constant_buffer(ctx,
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PIPE_SHADER_FRAGMENT, 1,
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&cb2);
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}
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static void set_viewport( float x, float y,
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float width, float height,
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float zNear, float zFar)
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{
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float z = zFar;
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float half_width = (float)width / 2.0f;
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float half_height = (float)height / 2.0f;
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float half_depth = ((float)zFar - (float)zNear) / 2.0f;
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struct pipe_viewport_state vp;
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vp.scale[0] = half_width;
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vp.scale[1] = half_height;
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vp.scale[2] = half_depth;
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vp.translate[0] = half_width + x;
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vp.translate[1] = half_height + y;
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vp.translate[2] = half_depth + z;
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ctx->set_viewport_states( ctx, 0, 1, &vp );
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}
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static void set_vertices( void )
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{
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struct pipe_vertex_element ve[3];
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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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ve[2].src_offset = Offset(struct vertex, texcoord);
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ve[2].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
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handle = ctx->create_vertex_elements_state(ctx, 3, ve);
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ctx->bind_vertex_elements_state(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(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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ctx->set_vertex_buffers(ctx, 0, 1, &vbuf);
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}
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static void 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 IN[2]\n"
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"DCL OUT[0], POSITION\n"
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"DCL OUT[1], COLOR[0]\n"
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"DCL OUT[2], GENERIC[0]\n"
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" MOV OUT[0], IN[0]\n"
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" MOV OUT[1], IN[1]\n"
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" MOV OUT[2], IN[2]\n"
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" END\n";
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handle = graw_parse_vertex_shader(ctx, text);
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ctx->bind_vs_state(ctx, handle);
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}
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static void set_fragment_shader( const char *filename )
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{
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FILE *f;
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char buf[50000];
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void *handle;
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int sz;
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if ((f = fopen(filename, "r")) == NULL) {
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fprintf(stderr, "Couldn't open %s\n", filename);
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exit(1);
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}
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sz = fread(buf, 1, sizeof(buf), f);
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if (!feof(f)) {
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printf("file too long\n");
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exit(1);
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}
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printf("%.*s\n", sz, buf);
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buf[sz] = 0;
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handle = graw_parse_fragment_shader(ctx, buf);
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ctx->bind_fs_state(ctx, handle);
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fclose(f);
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}
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static void draw( void )
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{
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union pipe_color_union clear_color = { {.1,.3,.5,0} };
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ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
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util_draw_arrays(ctx, PIPE_PRIM_TRIANGLES, 0, 3);
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ctx->flush(ctx, NULL, 0);
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graw_save_surface_to_file(ctx, surf, NULL);
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screen->flush_frontbuffer(screen, rttex, 0, 0, window, NULL);
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}
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#define SIZE 16
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static void init_tex( void )
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{
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struct pipe_sampler_view sv_template;
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struct pipe_sampler_state sampler_desc;
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struct pipe_resource templat;
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struct pipe_box box;
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ubyte tex2d[SIZE][SIZE][4];
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int s, t;
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#if (SIZE != 2)
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for (s = 0; s < SIZE; s++) {
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for (t = 0; t < SIZE; t++) {
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if (0) {
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int x = (s ^ t) & 1;
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tex2d[t][s][0] = (x) ? 0 : 63;
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tex2d[t][s][1] = (x) ? 0 : 128;
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tex2d[t][s][2] = 0;
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tex2d[t][s][3] = 0xff;
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}
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else {
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int x = ((s ^ t) >> 2) & 1;
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tex2d[t][s][0] = s*255/(SIZE-1);
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tex2d[t][s][1] = t*255/(SIZE-1);
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tex2d[t][s][2] = (x) ? 0 : 128;
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tex2d[t][s][3] = 0xff;
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}
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}
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}
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#else
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tex2d[0][0][0] = 0;
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tex2d[0][0][1] = 255;
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tex2d[0][0][2] = 255;
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tex2d[0][0][3] = 0;
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tex2d[0][1][0] = 0;
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tex2d[0][1][1] = 0;
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tex2d[0][1][2] = 255;
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tex2d[0][1][3] = 255;
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tex2d[1][0][0] = 255;
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tex2d[1][0][1] = 255;
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tex2d[1][0][2] = 0;
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tex2d[1][0][3] = 255;
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tex2d[1][1][0] = 255;
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tex2d[1][1][1] = 0;
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tex2d[1][1][2] = 0;
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tex2d[1][1][3] = 255;
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#endif
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memset(&templat, 0, sizeof(templat));
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templat.target = PIPE_TEXTURE_2D;
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templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
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templat.width0 = SIZE;
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templat.height0 = SIZE;
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templat.depth0 = 1;
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templat.array_size = 1;
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templat.last_level = 0;
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templat.nr_samples = 1;
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templat.bind = PIPE_BIND_SAMPLER_VIEW;
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samptex = screen->resource_create(screen,
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&templat);
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if (samptex == NULL)
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exit(4);
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u_box_2d(0,0,SIZE,SIZE, &box);
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ctx->texture_subdata(ctx,
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samptex,
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0,
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PIPE_TRANSFER_WRITE,
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&box,
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tex2d,
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sizeof tex2d[0],
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sizeof tex2d);
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/* Possibly read back & compare against original data:
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*/
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if (0)
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{
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struct pipe_transfer *t;
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uint32_t *ptr;
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ptr = pipe_transfer_map(ctx, samptex,
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0, 0, /* level, layer */
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PIPE_TRANSFER_READ,
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0, 0, SIZE, SIZE, &t); /* x, y, width, height */
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if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
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assert(0);
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exit(9);
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}
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ctx->transfer_unmap(ctx, t);
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}
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memset(&sv_template, 0, sizeof sv_template);
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sv_template.format = samptex->format;
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sv_template.texture = samptex;
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sv_template.swizzle_r = 0;
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sv_template.swizzle_g = 1;
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sv_template.swizzle_b = 2;
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sv_template.swizzle_a = 3;
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sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
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if (sv == NULL)
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exit(5);
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ctx->set_sampler_views(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
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memset(&sampler_desc, 0, sizeof sampler_desc);
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sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
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sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
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sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
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sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
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sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
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sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
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sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
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sampler_desc.compare_func = 0;
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sampler_desc.normalized_coords = 1;
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sampler_desc.max_anisotropy = 0;
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sampler = ctx->create_sampler_state(ctx, &sampler_desc);
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if (sampler == NULL)
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exit(6);
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ctx->bind_sampler_states(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sampler);
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}
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static void init( void )
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{
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struct pipe_framebuffer_state fb;
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struct pipe_resource templat;
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struct pipe_surface surf_tmpl;
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int i;
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/* It's hard to say whether window or screen should be created
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* first. Different environments would prefer one or the other.
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*
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* Also, no easy way of querying supported formats if the screen
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* cannot be created first.
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*/
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for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
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screen = graw_create_window_and_screen(0, 0, 300, 300,
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formats[i],
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&window);
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if (window && screen)
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break;
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}
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if (!screen || !window) {
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fprintf(stderr, "Unable to create window\n");
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exit(1);
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}
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ctx = screen->context_create(screen, NULL, 0);
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if (ctx == NULL)
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exit(3);
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memset(&templat, 0, sizeof(templat));
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templat.target = PIPE_TEXTURE_2D;
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templat.format = formats[i];
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templat.width0 = WIDTH;
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templat.height0 = HEIGHT;
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templat.depth0 = 1;
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templat.array_size = 1;
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templat.last_level = 0;
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templat.nr_samples = 1;
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templat.bind = (PIPE_BIND_RENDER_TARGET |
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PIPE_BIND_DISPLAY_TARGET);
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rttex = screen->resource_create(screen,
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&templat);
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if (rttex == NULL)
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exit(4);
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surf_tmpl.format = templat.format;
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surf_tmpl.u.tex.level = 0;
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surf_tmpl.u.tex.first_layer = 0;
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surf_tmpl.u.tex.last_layer = 0;
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surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
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if (surf == NULL)
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exit(5);
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memset(&fb, 0, sizeof fb);
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fb.nr_cbufs = 1;
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fb.width = WIDTH;
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fb.height = HEIGHT;
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fb.cbufs[0] = surf;
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ctx->set_framebuffer_state(ctx, &fb);
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{
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struct pipe_blend_state blend;
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void *handle;
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memset(&blend, 0, sizeof blend);
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blend.rt[0].colormask = PIPE_MASK_RGBA;
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handle = ctx->create_blend_state(ctx, &blend);
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ctx->bind_blend_state(ctx, handle);
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}
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{
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struct pipe_depth_stencil_alpha_state depthstencil;
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void *handle;
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memset(&depthstencil, 0, sizeof depthstencil);
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handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
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ctx->bind_depth_stencil_alpha_state(ctx, handle);
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}
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{
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struct pipe_rasterizer_state rasterizer;
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void *handle;
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memset(&rasterizer, 0, sizeof rasterizer);
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rasterizer.cull_face = PIPE_FACE_NONE;
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rasterizer.half_pixel_center = 1;
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rasterizer.bottom_edge_rule = 1;
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rasterizer.depth_clip = 1;
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handle = ctx->create_rasterizer_state(ctx, &rasterizer);
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ctx->bind_rasterizer_state(ctx, handle);
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}
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set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
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init_tex();
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init_fs_constbuf();
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set_vertices();
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set_vertex_shader();
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set_fragment_shader(filename);
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}
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static void args(int argc, char *argv[])
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{
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int i;
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for (i = 1; i < argc;) {
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if (graw_parse_args(&i, argc, argv)) {
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continue;
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}
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if (strcmp(argv[i], "-fps") == 0) {
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show_fps = 1;
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i++;
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}
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else if (i == argc - 1) {
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filename = argv[i];
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i++;
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}
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else {
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usage(argv[0]);
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exit(1);
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}
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}
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if (!filename) {
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usage(argv[0]);
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exit(1);
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}
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}
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int main( int argc, char *argv[] )
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{
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args(argc,argv);
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init();
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graw_set_display_func( draw );
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graw_main_loop();
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return 0;
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}
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