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/arbprogram.h"
  30 #include "main/arrayobj.h"
  31 #include "main/bufferobj.h"
  32 #include "main/enable.h"
  33 #include "main/matrix.h"
  34 #include "main/texstate.h"
  35 #include "main/varray.h"
  36 #include "main/viewport.h"
  37 #include "program/program.h"
  38 #include "dri_metaops.h"
  39
  40 void
  41 meta_set_passthrough_transform(struct dri_metaops *meta)
  42 {
  43    GLcontext *ctx = meta->ctx;
  44
  45    meta->saved_vp_x = ctx->Viewport.X;
  46    meta->saved_vp_y = ctx->Viewport.Y;
  47    meta->saved_vp_width = ctx->Viewport.Width;
  48    meta->saved_vp_height = ctx->Viewport.Height;
  49    meta->saved_matrix_mode = ctx->Transform.MatrixMode;
  50
  51    meta->internal_viewport_call = GL_TRUE;
  52    _mesa_Viewport(0, 0, ctx->DrawBuffer->Width, ctx->DrawBuffer->Height);
  53    meta->internal_viewport_call = GL_FALSE;
  54
  55    _mesa_MatrixMode(GL_PROJECTION);
  56    _mesa_PushMatrix();
  57    _mesa_LoadIdentity();
  58    _mesa_Ortho(0, ctx->DrawBuffer->Width, 0, ctx->DrawBuffer->Height, 1, -1);
  59
  60    _mesa_MatrixMode(GL_MODELVIEW);
  61    _mesa_PushMatrix();
  62    _mesa_LoadIdentity();
  63 }
  64
  65 void
  66 meta_restore_transform(struct dri_metaops *meta)
  67 {
  68    _mesa_MatrixMode(GL_PROJECTION);
  69    _mesa_PopMatrix();
  70    _mesa_MatrixMode(GL_MODELVIEW);
  71    _mesa_PopMatrix();
  72
  73    _mesa_MatrixMode(meta->saved_matrix_mode);
  74
  75    meta->internal_viewport_call = GL_TRUE;
  76    _mesa_Viewport(meta->saved_vp_x, meta->saved_vp_y,
  77                   meta->saved_vp_width, meta->saved_vp_height);
  78    meta->internal_viewport_call = GL_FALSE;
  79 }
  80
  81
  82 /**
  83  * Set up a vertex program to pass through the position and first texcoord
  84  * for pixel path.
  85  */
  86 void
  87 meta_set_passthrough_vertex_program(struct dri_metaops *meta)
  88 {
  89    GLcontext *ctx = meta->ctx;
  90    static const char *vp =
  91       "!!ARBvp1.0\n"
  92       "TEMP vertexClip;\n"
  93       "DP4 vertexClip.x, state.matrix.mvp.row[0], vertex.position;\n"
  94       "DP4 vertexClip.y, state.matrix.mvp.row[1], vertex.position;\n"
  95       "DP4 vertexClip.z, state.matrix.mvp.row[2], vertex.position;\n"
  96       "DP4 vertexClip.w, state.matrix.mvp.row[3], vertex.position;\n"
  97       "MOV result.position, vertexClip;\n"
  98       "MOV result.texcoord[0], vertex.texcoord[0];\n"
  99       "MOV result.color, vertex.color;\n"
 100       "END\n";
 101
 102    assert(meta->saved_vp == NULL);
 103
 104    _mesa_reference_vertprog(ctx, &meta->saved_vp,
 105                             ctx->VertexProgram.Current);
 106    if (meta->passthrough_vp == NULL) {
 107       GLuint prog_name;
 108       _mesa_GenPrograms(1, &prog_name);
 109       _mesa_BindProgram(GL_VERTEX_PROGRAM_ARB, prog_name);
 110       _mesa_ProgramStringARB(GL_VERTEX_PROGRAM_ARB,
 111                              GL_PROGRAM_FORMAT_ASCII_ARB,
 112                              strlen(vp), (const GLubyte *)vp);
 113       _mesa_reference_vertprog(ctx, &meta->passthrough_vp,
 114                                ctx->VertexProgram.Current);
 115       _mesa_DeletePrograms(1, &prog_name);
 116    }
 117
 118    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 119    _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
 120                             meta->passthrough_vp);
 121    ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
 122                            &meta->passthrough_vp->Base);
 123
 124    meta->saved_vp_enable = ctx->VertexProgram.Enabled;
 125    _mesa_Enable(GL_VERTEX_PROGRAM_ARB);
 126 }
 127
 128 /**
 129  * Restores the previous vertex program after
 130  * meta_set_passthrough_vertex_program()
 131  */
 132 void
 133 meta_restore_vertex_program(struct dri_metaops *meta)
 134 {
 135    GLcontext *ctx = meta->ctx;
 136
 137    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 138    _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
 139                             meta->saved_vp);
 140    _mesa_reference_vertprog(ctx, &meta->saved_vp, NULL);
 141    ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
 142                            &ctx->VertexProgram.Current->Base);
 143
 144    if (!meta->saved_vp_enable)
 145       _mesa_Disable(GL_VERTEX_PROGRAM_ARB);
 146 }
 147
 148 /**
 149  * Binds the given program string to GL_FRAGMENT_PROGRAM_ARB, caching the
 150  * program object.
 151  */
 152 void
 153 meta_set_fragment_program(struct dri_metaops *meta,
 154                           struct gl_fragment_program **prog,
 155                           const char *prog_string)
 156 {
 157    GLcontext *ctx = meta->ctx;
 158    assert(meta->saved_fp == NULL);
 159
 160    _mesa_reference_fragprog(ctx, &meta->saved_fp,
 161                             ctx->FragmentProgram.Current);
 162    if (*prog == NULL) {
 163       GLuint prog_name;
 164       _mesa_GenPrograms(1, &prog_name);
 165       _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, prog_name);
 166       _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB,
 167                              GL_PROGRAM_FORMAT_ASCII_ARB,
 168                              strlen(prog_string), (const GLubyte *)prog_string);
 169       _mesa_reference_fragprog(ctx, prog, ctx->FragmentProgram.Current);
 170       /* Note that DeletePrograms unbinds the program on us */
 171       _mesa_DeletePrograms(1, &prog_name);
 172    }
 173
 174    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 175    _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, *prog);
 176    ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, &((*prog)->Base));
 177
 178    meta->saved_fp_enable = ctx->FragmentProgram.Enabled;
 179    _mesa_Enable(GL_FRAGMENT_PROGRAM_ARB);
 180 }
 181
 182 /**
 183  * Restores the previous fragment program after
 184  * meta_set_fragment_program()
 185  */
 186 void
 187 meta_restore_fragment_program(struct dri_metaops *meta)
 188 {
 189    GLcontext *ctx = meta->ctx;
 190
 191    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 192    _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
 193                             meta->saved_fp);
 194    _mesa_reference_fragprog(ctx, &meta->saved_fp, NULL);
 195    ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB,
 196                            &ctx->FragmentProgram.Current->Base);
 197
 198    if (!meta->saved_fp_enable)
 199       _mesa_Disable(GL_FRAGMENT_PROGRAM_ARB);
 200 }
 201
 202 static const float default_texcoords[4][2] = { { 0.0, 0.0 },
 203                                                { 1.0, 0.0 },
 204                                                { 1.0, 1.0 },
 205                                                { 0.0, 1.0 } };
 206
 207 void
 208 meta_set_default_texrect(struct dri_metaops *meta)
 209 {
 210    GLcontext *ctx = meta->ctx;
 211    struct gl_client_array *old_texcoord_array;
 212
 213    meta->saved_active_texture = ctx->Texture.CurrentUnit;
 214    if (meta->saved_array_vbo == NULL) {
 215       _mesa_reference_buffer_object(ctx, &meta->saved_array_vbo,
 216                                     ctx->Array.ArrayBufferObj);
 217    }
 218
 219    old_texcoord_array = &ctx->Array.ArrayObj->TexCoord[0];
 220    meta->saved_texcoord_type = old_texcoord_array->Type;
 221    meta->saved_texcoord_size = old_texcoord_array->Size;
 222    meta->saved_texcoord_stride = old_texcoord_array->Stride;
 223    meta->saved_texcoord_enable = old_texcoord_array->Enabled;
 224    meta->saved_texcoord_ptr = old_texcoord_array->Ptr;
 225    _mesa_reference_buffer_object(ctx, &meta->saved_texcoord_vbo,
 226                                  old_texcoord_array->BufferObj);
 227
 228    _mesa_ClientActiveTextureARB(GL_TEXTURE0);
 229
 230    if (meta->texcoord_vbo == NULL) {
 231       GLuint vbo_name;
 232
 233       _mesa_GenBuffersARB(1, &vbo_name);
 234       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, vbo_name);
 235       _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(default_texcoords),
 236                           default_texcoords, GL_STATIC_DRAW_ARB);
 237       _mesa_reference_buffer_object(ctx, &meta->texcoord_vbo,
 238                                     ctx->Array.ArrayBufferObj);
 239    } else {
 240       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
 241                           meta->texcoord_vbo->Name);
 242    }
 243    _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), NULL);
 244
 245    _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
 246 }
 247
 248 void
 249 meta_restore_texcoords(struct dri_metaops *meta)
 250 {
 251    GLcontext *ctx = meta->ctx;
 252
 253    /* Restore the old TexCoordPointer */
 254    if (meta->saved_texcoord_vbo) {
 255       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
 256                           meta->saved_texcoord_vbo->Name);
 257       _mesa_reference_buffer_object(ctx, &meta->saved_texcoord_vbo, NULL);
 258    } else {
 259       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 260    }
 261
 262    _mesa_TexCoordPointer(meta->saved_texcoord_size,
 263                          meta->saved_texcoord_type,
 264                          meta->saved_texcoord_stride,
 265                          meta->saved_texcoord_ptr);
 266    if (!meta->saved_texcoord_enable)
 267       _mesa_Disable(GL_TEXTURE_COORD_ARRAY);
 268
 269    _mesa_ClientActiveTextureARB(GL_TEXTURE0 +
 270                                 meta->saved_active_texture);
 271
 272    if (meta->saved_array_vbo) {
 273       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
 274                           meta->saved_array_vbo->Name);
 275       _mesa_reference_buffer_object(ctx, &meta->saved_array_vbo, NULL);
 276    } else {
 277       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 278    }
 279 }
 280
 281
 282 void meta_init_metaops(GLcontext *ctx, struct dri_metaops *meta)
 283 {
 284    meta->ctx = ctx;
 285 }
 286
 287 void meta_destroy_metaops(struct dri_metaops *meta)
 288 {
 289
 290 }