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1901 | serge | 1 | /************************************************************************** |
2 | * |
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3 | * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. |
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4 | * All Rights Reserved. |
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5 | * |
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6 | **************************************************************************/ |
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7 | |||
8 | |||
9 | /** |
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10 | * Implementation of glDrawTex() for GL_OES_draw_tex |
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11 | */ |
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12 | |||
13 | |||
14 | |||
15 | #include "main/imports.h" |
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16 | #include "main/image.h" |
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17 | #include "main/macros.h" |
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18 | #include "program/program.h" |
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19 | #include "program/prog_print.h" |
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20 | |||
21 | #include "st_context.h" |
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22 | #include "st_atom.h" |
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23 | #include "st_cb_drawtex.h" |
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24 | |||
25 | #include "pipe/p_context.h" |
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26 | #include "pipe/p_defines.h" |
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27 | #include "util/u_inlines.h" |
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28 | #include "pipe/p_shader_tokens.h" |
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29 | #include "util/u_draw_quad.h" |
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30 | #include "util/u_simple_shaders.h" |
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31 | |||
32 | #include "cso_cache/cso_context.h" |
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33 | |||
34 | |||
35 | #if FEATURE_OES_draw_texture |
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36 | |||
37 | |||
38 | struct cached_shader |
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39 | { |
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40 | void *handle; |
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41 | |||
42 | uint num_attribs; |
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43 | uint semantic_names[2 + MAX_TEXTURE_UNITS]; |
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44 | uint semantic_indexes[2 + MAX_TEXTURE_UNITS]; |
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45 | }; |
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46 | |||
47 | #define MAX_SHADERS (2 * MAX_TEXTURE_UNITS) |
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48 | |||
49 | /** |
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50 | * Simple linear list cache. |
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51 | * Most of the time there'll only be one cached shader. |
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52 | */ |
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53 | static struct cached_shader CachedShaders[MAX_SHADERS]; |
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54 | static GLuint NumCachedShaders = 0; |
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55 | |||
56 | |||
57 | static void * |
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58 | lookup_shader(struct pipe_context *pipe, |
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59 | uint num_attribs, |
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60 | const uint *semantic_names, |
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61 | const uint *semantic_indexes) |
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62 | { |
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63 | GLuint i, j; |
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64 | |||
65 | /* look for existing shader with same attributes */ |
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66 | for (i = 0; i < NumCachedShaders; i++) { |
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67 | if (CachedShaders[i].num_attribs == num_attribs) { |
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68 | GLboolean match = GL_TRUE; |
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69 | for (j = 0; j < num_attribs; j++) { |
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70 | if (semantic_names[j] != CachedShaders[i].semantic_names[j] || |
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71 | semantic_indexes[j] != CachedShaders[i].semantic_indexes[j]) { |
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72 | match = GL_FALSE; |
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73 | break; |
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74 | } |
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75 | } |
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76 | if (match) |
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77 | return CachedShaders[i].handle; |
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78 | } |
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79 | } |
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80 | |||
81 | /* not found - create new one now */ |
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82 | if (NumCachedShaders >= MAX_SHADERS) { |
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83 | return NULL; |
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84 | } |
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85 | |||
86 | CachedShaders[i].num_attribs = num_attribs; |
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87 | for (j = 0; j < num_attribs; j++) { |
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88 | CachedShaders[i].semantic_names[j] = semantic_names[j]; |
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89 | CachedShaders[i].semantic_indexes[j] = semantic_indexes[j]; |
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90 | } |
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91 | |||
92 | CachedShaders[i].handle = |
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93 | util_make_vertex_passthrough_shader(pipe, |
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94 | num_attribs, |
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95 | semantic_names, |
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96 | semantic_indexes); |
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97 | NumCachedShaders++; |
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98 | |||
99 | return CachedShaders[i].handle; |
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100 | } |
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101 | |||
102 | static void |
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103 | st_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z, |
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104 | GLfloat width, GLfloat height) |
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105 | { |
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106 | struct st_context *st = ctx->st; |
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107 | struct pipe_context *pipe = st->pipe; |
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108 | struct cso_context *cso = ctx->st->cso_context; |
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109 | struct pipe_resource *vbuffer; |
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110 | struct pipe_transfer *vbuffer_transfer; |
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111 | GLuint i, numTexCoords, numAttribs; |
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112 | GLboolean emitColor; |
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113 | uint semantic_names[2 + MAX_TEXTURE_UNITS]; |
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114 | uint semantic_indexes[2 + MAX_TEXTURE_UNITS]; |
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115 | struct pipe_vertex_element velements[2 + MAX_TEXTURE_UNITS]; |
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116 | GLbitfield inputs = VERT_BIT_POS; |
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117 | |||
118 | st_validate_state(st); |
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119 | |||
120 | /* determine if we need vertex color */ |
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121 | if (ctx->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_COL0) |
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122 | emitColor = GL_TRUE; |
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123 | else |
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124 | emitColor = GL_FALSE; |
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125 | |||
126 | /* determine how many enabled sets of texcoords */ |
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127 | numTexCoords = 0; |
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128 | for (i = 0; i < ctx->Const.MaxTextureUnits; i++) { |
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129 | if (ctx->Texture.Unit[i]._ReallyEnabled & TEXTURE_2D_BIT) { |
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130 | inputs |= VERT_BIT_TEX(i); |
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131 | numTexCoords++; |
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132 | } |
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133 | } |
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134 | |||
135 | /* total number of attributes per vertex */ |
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136 | numAttribs = 1 + emitColor + numTexCoords; |
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137 | |||
138 | |||
139 | /* create the vertex buffer */ |
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140 | vbuffer = pipe_buffer_create(pipe->screen, PIPE_BIND_VERTEX_BUFFER, |
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141 | numAttribs * 4 * 4 * sizeof(GLfloat)); |
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142 | |||
143 | /* load vertex buffer */ |
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144 | { |
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145 | #define SET_ATTRIB(VERT, ATTR, X, Y, Z, W) \ |
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146 | do { \ |
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147 | GLuint k = (((VERT) * numAttribs + (ATTR)) * 4); \ |
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148 | assert(k < 4 * 4 * numAttribs); \ |
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149 | vbuf[k + 0] = X; \ |
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150 | vbuf[k + 1] = Y; \ |
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151 | vbuf[k + 2] = Z; \ |
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152 | vbuf[k + 3] = W; \ |
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153 | } while (0) |
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154 | |||
155 | const GLfloat x0 = x, y0 = y, x1 = x + width, y1 = y + height; |
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156 | GLfloat *vbuf = (GLfloat *) pipe_buffer_map(pipe, vbuffer, |
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157 | PIPE_TRANSFER_WRITE, |
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158 | &vbuffer_transfer); |
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159 | GLuint attr; |
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160 | |||
161 | z = CLAMP(z, 0.0f, 1.0f); |
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162 | |||
163 | /* positions (in clip coords) */ |
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164 | { |
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165 | const struct gl_framebuffer *fb = st->ctx->DrawBuffer; |
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166 | const GLfloat fb_width = (GLfloat)fb->Width; |
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167 | const GLfloat fb_height = (GLfloat)fb->Height; |
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168 | |||
169 | const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0); |
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170 | const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0); |
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171 | const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0); |
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172 | const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0); |
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173 | |||
174 | SET_ATTRIB(0, 0, clip_x0, clip_y0, z, 1.0f); /* lower left */ |
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175 | SET_ATTRIB(1, 0, clip_x1, clip_y0, z, 1.0f); /* lower right */ |
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176 | SET_ATTRIB(2, 0, clip_x1, clip_y1, z, 1.0f); /* upper right */ |
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177 | SET_ATTRIB(3, 0, clip_x0, clip_y1, z, 1.0f); /* upper left */ |
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178 | |||
179 | semantic_names[0] = TGSI_SEMANTIC_POSITION; |
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180 | semantic_indexes[0] = 0; |
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181 | } |
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182 | |||
183 | /* colors */ |
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184 | if (emitColor) { |
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185 | const GLfloat *c = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; |
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186 | SET_ATTRIB(0, 1, c[0], c[1], c[2], c[3]); |
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187 | SET_ATTRIB(1, 1, c[0], c[1], c[2], c[3]); |
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188 | SET_ATTRIB(2, 1, c[0], c[1], c[2], c[3]); |
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189 | SET_ATTRIB(3, 1, c[0], c[1], c[2], c[3]); |
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190 | semantic_names[1] = TGSI_SEMANTIC_COLOR; |
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191 | semantic_indexes[1] = 0; |
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192 | attr = 2; |
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193 | } |
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194 | else { |
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195 | attr = 1; |
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196 | } |
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197 | |||
198 | /* texcoords */ |
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199 | for (i = 0; i < ctx->Const.MaxTextureUnits; i++) { |
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200 | if (ctx->Texture.Unit[i]._ReallyEnabled & TEXTURE_2D_BIT) { |
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201 | struct gl_texture_object *obj = ctx->Texture.Unit[i]._Current; |
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202 | struct gl_texture_image *img = obj->Image[0][obj->BaseLevel]; |
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203 | const GLfloat wt = (GLfloat) img->Width; |
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204 | const GLfloat ht = (GLfloat) img->Height; |
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205 | const GLfloat s0 = obj->CropRect[0] / wt; |
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206 | const GLfloat t0 = obj->CropRect[1] / ht; |
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207 | const GLfloat s1 = (obj->CropRect[0] + obj->CropRect[2]) / wt; |
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208 | const GLfloat t1 = (obj->CropRect[1] + obj->CropRect[3]) / ht; |
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209 | |||
210 | /*printf("crop texcoords: %g, %g .. %g, %g\n", s0, t0, s1, t1);*/ |
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211 | SET_ATTRIB(0, attr, s0, t0, 0.0f, 1.0f); /* lower left */ |
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212 | SET_ATTRIB(1, attr, s1, t0, 0.0f, 1.0f); /* lower right */ |
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213 | SET_ATTRIB(2, attr, s1, t1, 0.0f, 1.0f); /* upper right */ |
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214 | SET_ATTRIB(3, attr, s0, t1, 0.0f, 1.0f); /* upper left */ |
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215 | |||
216 | semantic_names[attr] = TGSI_SEMANTIC_GENERIC; |
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217 | semantic_indexes[attr] = 0; |
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218 | |||
219 | attr++; |
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220 | } |
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221 | } |
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222 | |||
223 | pipe_buffer_unmap(pipe, vbuffer, vbuffer_transfer); |
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224 | |||
225 | #undef SET_ATTRIB |
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226 | } |
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227 | |||
228 | |||
229 | cso_save_viewport(cso); |
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230 | cso_save_vertex_shader(cso); |
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231 | cso_save_vertex_elements(cso); |
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232 | |||
233 | { |
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234 | void *vs = lookup_shader(pipe, numAttribs, |
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235 | semantic_names, semantic_indexes); |
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236 | cso_set_vertex_shader_handle(cso, vs); |
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237 | } |
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238 | |||
239 | for (i = 0; i < numAttribs; i++) { |
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240 | velements[i].src_offset = i * 4 * sizeof(float); |
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241 | velements[i].instance_divisor = 0; |
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242 | velements[i].vertex_buffer_index = 0; |
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243 | velements[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
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244 | } |
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245 | cso_set_vertex_elements(cso, numAttribs, velements); |
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246 | |||
247 | /* viewport state: viewport matching window dims */ |
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248 | { |
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249 | const struct gl_framebuffer *fb = st->ctx->DrawBuffer; |
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250 | const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); |
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251 | const GLfloat width = (GLfloat)fb->Width; |
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252 | const GLfloat height = (GLfloat)fb->Height; |
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253 | struct pipe_viewport_state vp; |
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254 | vp.scale[0] = 0.5f * width; |
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255 | vp.scale[1] = height * (invert ? -0.5f : 0.5f); |
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256 | vp.scale[2] = 1.0f; |
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257 | vp.scale[3] = 1.0f; |
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258 | vp.translate[0] = 0.5f * width; |
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259 | vp.translate[1] = 0.5f * height; |
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260 | vp.translate[2] = 0.0f; |
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261 | vp.translate[3] = 0.0f; |
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262 | cso_set_viewport(cso, &vp); |
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263 | } |
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264 | |||
265 | |||
266 | util_draw_vertex_buffer(pipe, vbuffer, |
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267 | 0, /* offset */ |
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268 | PIPE_PRIM_TRIANGLE_FAN, |
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269 | 4, /* verts */ |
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270 | numAttribs); /* attribs/vert */ |
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271 | |||
272 | |||
273 | pipe_resource_reference(&vbuffer, NULL); |
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274 | |||
275 | /* restore state */ |
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276 | cso_restore_viewport(cso); |
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277 | cso_restore_vertex_shader(cso); |
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278 | cso_restore_vertex_elements(cso); |
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279 | } |
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280 | |||
281 | |||
282 | void |
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283 | st_init_drawtex_functions(struct dd_function_table *functions) |
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284 | { |
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285 | functions->DrawTex = st_DrawTex; |
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286 | } |
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287 | |||
288 | |||
289 | /** |
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290 | * Free any cached shaders |
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291 | */ |
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292 | void |
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293 | st_destroy_drawtex(struct st_context *st) |
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294 | { |
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295 | GLuint i; |
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296 | for (i = 0; i < NumCachedShaders; i++) { |
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297 | cso_delete_vertex_shader(st->cso_context, CachedShaders[i].handle); |
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298 | } |
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299 | NumCachedShaders = 0; |
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300 | } |
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301 | |||
302 | |||
303 | #endif /* FEATURE_OES_draw_texture */>>>>>>>> |