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5564 | serge | 1 | /* Test the writing Z in fragment shader. |
2 | * The red quad should be entirely in front of the blue quad even |
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3 | * though the overlap and intersect in Z. |
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4 | */ |
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5 | |||
6 | #include |
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7 | |||
8 | #include "graw_util.h" |
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9 | |||
10 | |||
11 | static int width = 300; |
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12 | static int height = 300; |
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13 | |||
14 | static struct graw_info info; |
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15 | |||
16 | |||
17 | struct vertex { |
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18 | float position[4]; |
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19 | float color[4]; |
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20 | }; |
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21 | |||
22 | #define z0 0.2 |
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23 | #define z01 0.5 |
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24 | #define z1 0.4 |
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25 | |||
26 | |||
27 | static struct vertex vertices[] = |
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28 | { |
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29 | /* left quad: clock-wise, front-facing, red */ |
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30 | { |
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31 | {-0.8, -0.9, z0, 1.0 }, |
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32 | { 1, 0, 0, 1 } |
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33 | }, |
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34 | |||
35 | { |
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36 | { -0.2, -0.9, z0, 1.0 }, |
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37 | { 1, 0, 0, 1 } |
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38 | }, |
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39 | |||
40 | { |
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41 | { 0.2, 0.9, z01, 1.0 }, |
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42 | { 1, 0, 0, 1 } |
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43 | }, |
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44 | |||
45 | { |
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46 | {-0.9, 0.9, z01, 1.0 }, |
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47 | { 1, 0, 0, 1 } |
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48 | }, |
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49 | |||
50 | /* right quad : counter-clock-wise, back-facing, green */ |
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51 | { |
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52 | { 0.2, -0.9, z1, 1.0 }, |
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53 | { 0, 0, 1, -1 } |
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54 | }, |
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55 | |||
56 | { |
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57 | { -0.2, 0.8, z1, 1.0 }, |
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58 | { 0, 0, 1, -1 } |
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59 | }, |
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60 | |||
61 | { |
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62 | { 0.9, 0.8, z1, 1.0 }, |
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63 | { 0, 0, 1, -1 } |
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64 | }, |
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65 | |||
66 | { |
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67 | { 0.8, -0.9, z1, 1.0 }, |
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68 | { 0, 0, 1, -1 } |
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69 | }, |
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70 | }; |
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71 | |||
72 | #define NUM_VERTS (sizeof(vertices) / sizeof(vertices[0])) |
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73 | |||
74 | |||
75 | |||
76 | static void |
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77 | set_vertices(void) |
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78 | { |
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79 | struct pipe_vertex_element ve[2]; |
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80 | struct pipe_vertex_buffer vbuf; |
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81 | void *handle; |
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82 | |||
83 | memset(ve, 0, sizeof ve); |
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84 | |||
85 | ve[0].src_offset = Offset(struct vertex, position); |
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86 | ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
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87 | ve[1].src_offset = Offset(struct vertex, color); |
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88 | ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
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89 | |||
90 | handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve); |
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91 | info.ctx->bind_vertex_elements_state(info.ctx, handle); |
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92 | |||
93 | memset(&vbuf, 0, sizeof vbuf); |
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94 | |||
95 | vbuf.stride = sizeof(struct vertex); |
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96 | vbuf.buffer_offset = 0; |
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97 | vbuf.buffer = pipe_buffer_create_with_data(info.ctx, |
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98 | PIPE_BIND_VERTEX_BUFFER, |
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99 | PIPE_USAGE_DEFAULT, |
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100 | sizeof(vertices), |
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101 | vertices); |
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102 | |||
103 | info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf); |
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104 | } |
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105 | |||
106 | |||
107 | static void |
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108 | set_vertex_shader(void) |
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109 | { |
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110 | void *handle; |
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111 | const char *text = |
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112 | "VERT\n" |
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113 | "DCL IN[0]\n" |
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114 | "DCL IN[1]\n" |
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115 | "DCL OUT[0], POSITION\n" |
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116 | "DCL OUT[1], GENERIC[0]\n" |
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117 | " 0: MOV OUT[0], IN[0]\n" |
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118 | " 1: MOV OUT[1], IN[1]\n" |
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119 | " 2: END\n"; |
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120 | |||
121 | handle = graw_parse_vertex_shader(info.ctx, text); |
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122 | info.ctx->bind_vs_state(info.ctx, handle); |
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123 | } |
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124 | |||
125 | |||
126 | static void |
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127 | set_fragment_shader(void) |
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128 | { |
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129 | void *handle; |
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130 | const char *text = |
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131 | "FRAG\n" |
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132 | "DCL IN[0], GENERIC, CONSTANT\n" |
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133 | "DCL OUT[0], COLOR\n" |
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134 | "DCL OUT[1], POSITION\n" |
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135 | "DCL TEMP[0]\n" |
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136 | "IMM FLT32 { 1.0, 0.0, 0.0, 0.0 }\n" |
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137 | "IMM FLT32 { 0.0, 1.0, 0.0, 0.0 }\n" |
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138 | "IMM FLT32 { 0.5, 0.4, 0.0, 0.0 }\n" |
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139 | " 0: MOV OUT[0], IN[0]\n" /* front-facing: red */ |
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140 | " 1: IF IN[0].xxxx :3\n" |
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141 | " 2: MOV OUT[1].z, IMM[2].yyyy\n" /* red: Z = 0.4 */ |
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142 | " 3: ELSE :5\n" |
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143 | " 4: MOV OUT[1].z, IMM[2].xxxx\n" /* blue: Z = 0.5 */ |
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144 | " 5: ENDIF\n" |
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145 | " 6: END\n"; |
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146 | |||
147 | handle = graw_parse_fragment_shader(info.ctx, text); |
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148 | info.ctx->bind_fs_state(info.ctx, handle); |
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149 | } |
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150 | |||
151 | |||
152 | |||
153 | static void |
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154 | draw(void) |
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155 | { |
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156 | union pipe_color_union clear_color; |
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157 | |||
158 | clear_color.f[0] = 0.25; |
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159 | clear_color.f[1] = 0.25; |
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160 | clear_color.f[2] = 0.25; |
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161 | clear_color.f[3] = 1.00; |
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162 | |||
163 | info.ctx->clear(info.ctx, |
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164 | PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL, |
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165 | &clear_color, 1.0, 0); |
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166 | util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS); |
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167 | info.ctx->flush(info.ctx, NULL, 0); |
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168 | |||
169 | #if 0 |
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170 | /* At the moment, libgraw leaks out/makes available some of the |
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171 | * symbols from gallium/auxiliary, including these debug helpers. |
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172 | * Will eventually want to bless some of these paths, and lock the |
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173 | * others down so they aren't accessible from test programs. |
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174 | * |
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175 | * This currently just happens to work on debug builds - a release |
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176 | * build will probably fail to link here: |
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177 | */ |
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178 | debug_dump_surface_bmp(info.ctx, "result.bmp", surf); |
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179 | #endif |
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180 | |||
181 | graw_util_flush_front(&info); |
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182 | } |
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183 | |||
184 | |||
185 | #if 0 |
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186 | static void |
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187 | resize(int w, int h) |
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188 | { |
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189 | width = w; |
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190 | height = h; |
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191 | |||
192 | graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0); |
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193 | } |
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194 | #endif |
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195 | |||
196 | |||
197 | static void |
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198 | init(void) |
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199 | { |
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200 | if (!graw_util_create_window(&info, width, height, 1, TRUE)) |
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201 | exit(1); |
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202 | |||
203 | graw_util_default_state(&info, TRUE); |
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204 | |||
205 | graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0); |
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206 | |||
207 | set_vertices(); |
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208 | set_vertex_shader(); |
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209 | set_fragment_shader(); |
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210 | } |
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211 | |||
212 | |||
213 | int |
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214 | main(int argc, char *argv[]) |
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215 | { |
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216 | init(); |
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217 | |||
218 | printf("The red quad should be entirely in front of the blue quad.\n"); |
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219 | |||
220 | graw_set_display_func(draw); |
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221 | /*graw_set_reshape_func(resize);*/ |
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222 | graw_main_loop(); |
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223 | return 0; |
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224 | } |