src/mesa/drivers/dri/common/dri_metaops.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * Copyright 2009 Intel Corporation.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 #include "main/arrayobj.h"
  30 #include "main/attrib.h"
  31 #include "main/blend.h"
  32 #include "main/bufferobj.h"
  33 #include "main/buffers.h"
  34 #include "main/depth.h"
  35 #include "main/enable.h"
  36 #include "main/matrix.h"
  37 #include "main/macros.h"
  38 #include "main/polygon.h"
  39 #include "main/shaders.h"
  40 #include "main/stencil.h"
  41 #include "main/texstate.h"
  42 #include "main/varray.h"
  43 #include "main/viewport.h"
  44 #include "shader/arbprogram.h"
  45 #include "shader/program.h"
  46 #include "dri_metaops.h"
  47
  48 void
  49 meta_set_passthrough_transform(struct dri_metaops *meta)
  50 {
  51    GLcontext *ctx = meta->ctx;
  52
  53    meta->saved_vp_x = ctx->Viewport.X;
  54    meta->saved_vp_y = ctx->Viewport.Y;
  55    meta->saved_vp_width = ctx->Viewport.Width;
  56    meta->saved_vp_height = ctx->Viewport.Height;
  57    meta->saved_matrix_mode = ctx->Transform.MatrixMode;
  58
  59    meta->internal_viewport_call = GL_TRUE;
  60    _mesa_Viewport(0, 0, ctx->DrawBuffer->Width, ctx->DrawBuffer->Height);
  61    meta->internal_viewport_call = GL_FALSE;
  62
  63    _mesa_MatrixMode(GL_PROJECTION);
  64    _mesa_PushMatrix();
  65    _mesa_LoadIdentity();
  66    _mesa_Ortho(0, ctx->DrawBuffer->Width, 0, ctx->DrawBuffer->Height, 1, -1);
  67
  68    _mesa_MatrixMode(GL_MODELVIEW);
  69    _mesa_PushMatrix();
  70    _mesa_LoadIdentity();
  71 }
  72
  73 void
  74 meta_restore_transform(struct dri_metaops *meta)
  75 {
  76    _mesa_MatrixMode(GL_PROJECTION);
  77    _mesa_PopMatrix();
  78    _mesa_MatrixMode(GL_MODELVIEW);
  79    _mesa_PopMatrix();
  80
  81    _mesa_MatrixMode(meta->saved_matrix_mode);
  82
  83    meta->internal_viewport_call = GL_TRUE;
  84    _mesa_Viewport(meta->saved_vp_x, meta->saved_vp_y,
  85                   meta->saved_vp_width, meta->saved_vp_height);
  86    meta->internal_viewport_call = GL_FALSE;
  87 }
  88
  89
  90 /**
  91  * Set up a vertex program to pass through the position and first texcoord
  92  * for pixel path.
  93  */
  94 void
  95 meta_set_passthrough_vertex_program(struct dri_metaops *meta)
  96 {
  97    GLcontext *ctx = meta->ctx;
  98    static const char *vp =
  99       "!!ARBvp1.0\n"
 100       "TEMP vertexClip;\n"
 101       "DP4 vertexClip.x, state.matrix.mvp.row[0], vertex.position;\n"
 102       "DP4 vertexClip.y, state.matrix.mvp.row[1], vertex.position;\n"
 103       "DP4 vertexClip.z, state.matrix.mvp.row[2], vertex.position;\n"
 104       "DP4 vertexClip.w, state.matrix.mvp.row[3], vertex.position;\n"
 105       "MOV result.position, vertexClip;\n"
 106       "MOV result.texcoord[0], vertex.texcoord[0];\n"
 107       "MOV result.color, vertex.color;\n"
 108       "END\n";
 109
 110    assert(meta->saved_vp == NULL);
 111
 112    _mesa_reference_vertprog(ctx, &meta->saved_vp,
 113                             ctx->VertexProgram.Current);
 114    if (meta->passthrough_vp == NULL) {
 115       GLuint prog_name;
 116       _mesa_GenPrograms(1, &prog_name);
 117       _mesa_BindProgram(GL_VERTEX_PROGRAM_ARB, prog_name);
 118       _mesa_ProgramStringARB(GL_VERTEX_PROGRAM_ARB,
 119                              GL_PROGRAM_FORMAT_ASCII_ARB,
 120                              strlen(vp), (const GLubyte *)vp);
 121       _mesa_reference_vertprog(ctx, &meta->passthrough_vp,
 122                                ctx->VertexProgram.Current);
 123       _mesa_DeletePrograms(1, &prog_name);
 124    }
 125
 126    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 127    _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
 128                             meta->passthrough_vp);
 129    ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
 130                            &meta->passthrough_vp->Base);
 131
 132    meta->saved_vp_enable = ctx->VertexProgram.Enabled;
 133    _mesa_Enable(GL_VERTEX_PROGRAM_ARB);
 134 }
 135
 136 /**
 137  * Restores the previous vertex program after
 138  * meta_set_passthrough_vertex_program()
 139  */
 140 void
 141 meta_restore_vertex_program(struct dri_metaops *meta)
 142 {
 143    GLcontext *ctx = meta->ctx;
 144
 145    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 146    _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
 147                             meta->saved_vp);
 148    _mesa_reference_vertprog(ctx, &meta->saved_vp, NULL);
 149    ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
 150                            &ctx->VertexProgram.Current->Base);
 151
 152    if (!meta->saved_vp_enable)
 153       _mesa_Disable(GL_VERTEX_PROGRAM_ARB);
 154 }
 155
 156 /**
 157  * Binds the given program string to GL_FRAGMENT_PROGRAM_ARB, caching the
 158  * program object.
 159  */
 160 void
 161 meta_set_fragment_program(struct dri_metaops *meta,
 162                           struct gl_fragment_program **prog,
 163                           const char *prog_string)
 164 {
 165    GLcontext *ctx = meta->ctx;
 166    assert(meta->saved_fp == NULL);
 167
 168    _mesa_reference_fragprog(ctx, &meta->saved_fp,
 169                             ctx->FragmentProgram.Current);
 170    if (*prog == NULL) {
 171       GLuint prog_name;
 172       _mesa_GenPrograms(1, &prog_name);
 173       _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, prog_name);
 174       _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB,
 175                              GL_PROGRAM_FORMAT_ASCII_ARB,
 176                              strlen(prog_string), (const GLubyte *)prog_string);
 177       _mesa_reference_fragprog(ctx, prog, ctx->FragmentProgram.Current);
 178       /* Note that DeletePrograms unbinds the program on us */
 179       _mesa_DeletePrograms(1, &prog_name);
 180    }
 181
 182    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 183    _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, *prog);
 184    ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, &((*prog)->Base));
 185
 186    meta->saved_fp_enable = ctx->FragmentProgram.Enabled;
 187    _mesa_Enable(GL_FRAGMENT_PROGRAM_ARB);
 188 }
 189
 190 /**
 191  * Restores the previous fragment program after
 192  * meta_set_fragment_program()
 193  */
 194 void
 195 meta_restore_fragment_program(struct dri_metaops *meta)
 196 {
 197    GLcontext *ctx = meta->ctx;
 198
 199    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 200    _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
 201                             meta->saved_fp);
 202    _mesa_reference_fragprog(ctx, &meta->saved_fp, NULL);
 203    ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB,
 204                            &ctx->FragmentProgram.Current->Base);
 205
 206    if (!meta->saved_fp_enable)
 207       _mesa_Disable(GL_FRAGMENT_PROGRAM_ARB);
 208 }
 209
 210 static const float default_texcoords[4][2] = { { 0.0, 0.0 },
 211                                                { 1.0, 0.0 },
 212                                                { 1.0, 1.0 },
 213                                                { 0.0, 1.0 } };
 214
 215 void
 216 meta_set_default_texrect(struct dri_metaops *meta)
 217 {
 218    GLcontext *ctx = meta->ctx;
 219    struct gl_client_array *old_texcoord_array;
 220
 221    meta->saved_active_texture = ctx->Texture.CurrentUnit;
 222    if (meta->saved_array_vbo == NULL) {
 223       _mesa_reference_buffer_object(ctx, &meta->saved_array_vbo,
 224                                     ctx->Array.ArrayBufferObj);
 225    }
 226
 227    old_texcoord_array = &ctx->Array.ArrayObj->TexCoord[0];
 228    meta->saved_texcoord_type = old_texcoord_array->Type;
 229    meta->saved_texcoord_size = old_texcoord_array->Size;
 230    meta->saved_texcoord_stride = old_texcoord_array->Stride;
 231    meta->saved_texcoord_enable = old_texcoord_array->Enabled;
 232    meta->saved_texcoord_ptr = old_texcoord_array->Ptr;
 233    _mesa_reference_buffer_object(ctx, &meta->saved_texcoord_vbo,
 234                                  old_texcoord_array->BufferObj);
 235
 236    _mesa_ClientActiveTextureARB(GL_TEXTURE0);
 237
 238    if (meta->texcoord_vbo == NULL) {
 239       GLuint vbo_name;
 240
 241       _mesa_GenBuffersARB(1, &vbo_name);
 242       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, vbo_name);
 243       _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(default_texcoords),
 244                           default_texcoords, GL_STATIC_DRAW_ARB);
 245       _mesa_reference_buffer_object(ctx, &meta->texcoord_vbo,
 246                                     ctx->Array.ArrayBufferObj);
 247    } else {
 248       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
 249                           meta->texcoord_vbo->Name);
 250    }
 251    _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), NULL);
 252
 253    _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
 254 }
 255
 256 void
 257 meta_restore_texcoords(struct dri_metaops *meta)
 258 {
 259    GLcontext *ctx = meta->ctx;
 260
 261    /* Restore the old TexCoordPointer */
 262    if (meta->saved_texcoord_vbo) {
 263       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
 264                           meta->saved_texcoord_vbo->Name);
 265       _mesa_reference_buffer_object(ctx, &meta->saved_texcoord_vbo, NULL);
 266    } else {
 267       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 268    }
 269
 270    _mesa_TexCoordPointer(meta->saved_texcoord_size,
 271                          meta->saved_texcoord_type,
 272                          meta->saved_texcoord_stride,
 273                          meta->saved_texcoord_ptr);
 274    if (!meta->saved_texcoord_enable)
 275       _mesa_Disable(GL_TEXTURE_COORD_ARRAY);
 276
 277    _mesa_ClientActiveTextureARB(GL_TEXTURE0 +
 278                                 meta->saved_active_texture);
 279
 280    if (meta->saved_array_vbo) {
 281       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
 282                           meta->saved_array_vbo->Name);
 283       _mesa_reference_buffer_object(ctx, &meta->saved_array_vbo, NULL);
 284    } else {
 285       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 286    }
 287 }
 288
 289
 290 void meta_init_metaops(GLcontext *ctx, struct dri_metaops *meta)
 291 {
 292    meta->ctx = ctx;
 293 }
 294
 295 void meta_destroy_metaops(struct dri_metaops *meta)
 296 {
 297
 298 }