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Rev | Author | Line No. | Line |
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4358 | Serge | 1 | /* Test the TGSI_SEMANTIC_FACE fragment shader input. |
2 | */ |
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3 | |||
4 | #include |
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5 | |||
6 | #include "graw_util.h" |
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7 | |||
8 | |||
9 | static int width = 300; |
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10 | static int height = 300; |
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11 | |||
12 | static struct graw_info info; |
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13 | |||
14 | struct vertex { |
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15 | float position[4]; |
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16 | float color[4]; |
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17 | }; |
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18 | |||
19 | #define z0 0.2 |
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20 | #define z01 0.5 |
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21 | #define z1 0.4 |
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22 | |||
23 | static struct vertex vertices[] = |
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24 | { |
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25 | /* left quad: clock-wise, front-facing, red */ |
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26 | { |
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27 | {-0.8, -0.9, z0, 1.0 }, |
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28 | { 0, 0, 0, 1 } |
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29 | }, |
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30 | |||
31 | { |
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32 | { -0.2, -0.9, z0, 1.0 }, |
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33 | { 0, 0, 0, 1 } |
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34 | }, |
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35 | |||
36 | { |
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37 | { 0.2, 0.9, z01, 1.0 }, |
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38 | { 0, 0, 0, 1 } |
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39 | }, |
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40 | |||
41 | { |
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42 | {-0.9, 0.9, z01, 1.0 }, |
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43 | { 0, 0, 0, 1 } |
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44 | }, |
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45 | |||
46 | /* right quad : counter-clock-wise, back-facing, green */ |
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47 | { |
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48 | { 0.2, -0.9, z1, 1.0 }, |
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49 | { 1, 1, 1, -1 } |
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50 | }, |
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51 | |||
52 | { |
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53 | { -0.2, 0.8, z1, 1.0 }, |
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54 | { 1, 1, 1, -1 } |
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55 | }, |
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56 | |||
57 | { |
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58 | { 0.9, 0.8, z1, 1.0 }, |
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59 | { 1, 1, 1, -1 } |
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60 | }, |
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61 | |||
62 | { |
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63 | { 0.8, -0.9, z1, 1.0 }, |
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64 | { 1, 1, 1, -1 } |
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65 | }, |
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66 | }; |
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67 | |||
68 | #define NUM_VERTS (sizeof(vertices) / sizeof(vertices[0])) |
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69 | |||
70 | |||
71 | |||
72 | static void |
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73 | set_vertices(void) |
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74 | { |
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75 | struct pipe_vertex_element ve[2]; |
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76 | struct pipe_vertex_buffer vbuf; |
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77 | void *handle; |
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78 | |||
79 | memset(ve, 0, sizeof ve); |
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80 | |||
81 | ve[0].src_offset = Offset(struct vertex, position); |
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82 | ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
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83 | ve[1].src_offset = Offset(struct vertex, color); |
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84 | ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
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85 | |||
86 | handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve); |
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87 | info.ctx->bind_vertex_elements_state(info.ctx, handle); |
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88 | |||
89 | memset(&vbuf, 0, sizeof vbuf); |
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90 | |||
91 | vbuf.stride = sizeof(struct vertex); |
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92 | vbuf.buffer_offset = 0; |
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93 | vbuf.buffer = pipe_buffer_create_with_data(info.ctx, |
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94 | PIPE_BIND_VERTEX_BUFFER, |
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95 | PIPE_USAGE_STATIC, |
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96 | sizeof(vertices), |
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97 | vertices); |
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98 | |||
99 | info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf); |
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100 | } |
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101 | |||
102 | |||
103 | static void |
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104 | set_vertex_shader(void) |
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105 | { |
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106 | void *handle; |
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107 | const char *text = |
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108 | "VERT\n" |
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109 | "DCL IN[0]\n" |
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110 | "DCL IN[1]\n" |
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111 | "DCL OUT[0], POSITION\n" |
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112 | "DCL OUT[1], GENERIC[0]\n" |
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113 | " 0: MOV OUT[0], IN[0]\n" |
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114 | " 1: MOV OUT[1], IN[1]\n" |
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115 | " 2: END\n"; |
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116 | |||
117 | handle = graw_parse_vertex_shader(info.ctx, text); |
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118 | info.ctx->bind_vs_state(info.ctx, handle); |
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119 | } |
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120 | |||
121 | |||
122 | static void |
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123 | set_fragment_shader(void) |
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124 | { |
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125 | void *handle; |
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126 | const char *text = |
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127 | "FRAG\n" |
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128 | "DCL IN[0], FACE, CONSTANT\n" |
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129 | "DCL IN[1], GENERIC, CONSTANT\n" |
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130 | "DCL OUT[0], COLOR\n" |
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131 | "DCL TEMP[0]\n" |
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132 | "IMM FLT32 { 1.0, 0.0, 0.0, 0.0 }\n" |
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133 | "IMM FLT32 { 0.0, 1.0, 0.0, 0.0 }\n" |
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134 | "IMM FLT32 { 0.5, 0.6, 0.0, 0.0 }\n" |
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135 | " 0: SGT TEMP[0].x, IN[0].xxxx, IMM[1].xxxx\n" /* TMP[0].x = IN[0].x > 0.0 */ |
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136 | " 1: IF TEMP[0].xxxx :4\n" |
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137 | " 2: MOV OUT[0], IMM[0]\n" /* front-facing: red */ |
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138 | " 3: ELSE :5\n" |
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139 | " 4: MOV OUT[0], IMM[1]\n" /* back-facing: green */ |
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140 | " 5: ENDIF\n" |
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141 | " 6: END\n"; |
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142 | |||
143 | handle = graw_parse_fragment_shader(info.ctx, text); |
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144 | info.ctx->bind_fs_state(info.ctx, handle); |
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145 | } |
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146 | |||
147 | |||
148 | static void |
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149 | draw(void) |
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150 | { |
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151 | union pipe_color_union clear_color; |
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152 | |||
153 | clear_color.f[0] = 0.25; |
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154 | clear_color.f[1] = 0.25; |
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155 | clear_color.f[2] = 0.25; |
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156 | clear_color.f[3] = 1.00; |
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157 | |||
158 | info.ctx->clear(info.ctx, |
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159 | PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL, |
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160 | &clear_color, 1.0, 0); |
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161 | util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS); |
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162 | info.ctx->flush(info.ctx, NULL, 0); |
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163 | |||
164 | graw_util_flush_front(&info); |
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165 | } |
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166 | |||
167 | |||
168 | #if 0 |
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169 | static void |
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170 | resize(int w, int h) |
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171 | { |
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172 | width = w; |
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173 | height = h; |
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174 | |||
175 | set_viewport(0, 0, width, height, 30, 1000); |
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176 | } |
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177 | #endif |
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178 | |||
179 | |||
180 | static void |
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181 | init(void) |
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182 | { |
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183 | if (!graw_util_create_window(&info, width, height, 1, TRUE)) |
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184 | exit(1); |
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185 | |||
186 | graw_util_default_state(&info, TRUE); |
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187 | |||
188 | graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0); |
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189 | |||
190 | set_vertices(); |
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191 | set_vertex_shader(); |
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192 | set_fragment_shader(); |
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193 | } |
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194 | |||
195 | |||
196 | int |
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197 | main(int argc, char *argv[]) |
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198 | { |
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199 | init(); |
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200 | |||
201 | printf("Left quad: clock-wise, front-facing, red\n"); |
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202 | printf("Right quad: counter clock-wise, back-facing, green\n"); |
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203 | |||
204 | graw_set_display_func(draw); |
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205 | /*graw_set_reshape_func(resize);*/ |
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206 | graw_main_loop(); |
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207 | return 0; |
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208 | } |