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/context.h"
  33 #include "main/enable.h"
  34 #include "main/matrix.h"
  35 #include "main/texstate.h"
  36 #include "main/varray.h"
  37 #include "main/viewport.h"
  38 #include "program/program.h"
  39 #include "dri_metaops.h"
  40
  41 void
  42 meta_set_passthrough_transform(struct dri_metaops *meta)
  43 {
  44    GLcontext *ctx = meta->ctx;
  45
  46    meta->saved_vp_x = ctx->Viewport.X;
  47    meta->saved_vp_y = ctx->Viewport.Y;
  48    meta->saved_vp_width = ctx->Viewport.Width;
  49    meta->saved_vp_height = ctx->Viewport.Height;
  50    meta->saved_matrix_mode = ctx->Transform.MatrixMode;
  51
  52    meta->internal_viewport_call = GL_TRUE;
  53    _mesa_Viewport(0, 0, ctx->DrawBuffer->Width, ctx->DrawBuffer->Height);
  54    meta->internal_viewport_call = GL_FALSE;
  55
  56    _mesa_MatrixMode(GL_PROJECTION);
  57    _mesa_PushMatrix();
  58    _mesa_LoadIdentity();
  59    _mesa_Ortho(0, ctx->DrawBuffer->Width, 0, ctx->DrawBuffer->Height, 1, -1);
  60
  61    _mesa_MatrixMode(GL_MODELVIEW);
  62    _mesa_PushMatrix();
  63    _mesa_LoadIdentity();
  64 }
  65
  66 void
  67 meta_restore_transform(struct dri_metaops *meta)
  68 {
  69    _mesa_MatrixMode(GL_PROJECTION);
  70    _mesa_PopMatrix();
  71    _mesa_MatrixMode(GL_MODELVIEW);
  72    _mesa_PopMatrix();
  73
  74    _mesa_MatrixMode(meta->saved_matrix_mode);
  75
  76    meta->internal_viewport_call = GL_TRUE;
  77    _mesa_Viewport(meta->saved_vp_x, meta->saved_vp_y,
  78                   meta->saved_vp_width, meta->saved_vp_height);
  79    meta->internal_viewport_call = GL_FALSE;
  80 }
  81
  82
  83 /**
  84  * Set up a vertex program to pass through the position and first texcoord
  85  * for pixel path.
  86  */
  87 void
  88 meta_set_passthrough_vertex_program(struct dri_metaops *meta)
  89 {
  90    GLcontext *ctx = meta->ctx;
  91    static const char *vp =
  92       "!!ARBvp1.0\n"
  93       "TEMP vertexClip;\n"
  94       "DP4 vertexClip.x, state.matrix.mvp.row[0], vertex.position;\n"
  95       "DP4 vertexClip.y, state.matrix.mvp.row[1], vertex.position;\n"
  96       "DP4 vertexClip.z, state.matrix.mvp.row[2], vertex.position;\n"
  97       "DP4 vertexClip.w, state.matrix.mvp.row[3], vertex.position;\n"
  98       "MOV result.position, vertexClip;\n"
  99       "MOV result.texcoord[0], vertex.texcoord[0];\n"
 100       "MOV result.color, vertex.color;\n"
 101       "END\n";
 102
 103    assert(meta->saved_vp == NULL);
 104
 105    _mesa_reference_vertprog(ctx, &meta->saved_vp,
 106                             ctx->VertexProgram.Current);
 107    if (meta->passthrough_vp == NULL) {
 108       GLuint prog_name;
 109       _mesa_GenPrograms(1, &prog_name);
 110       _mesa_BindProgram(GL_VERTEX_PROGRAM_ARB, prog_name);
 111       _mesa_ProgramStringARB(GL_VERTEX_PROGRAM_ARB,
 112                              GL_PROGRAM_FORMAT_ASCII_ARB,
 113                              strlen(vp), (const GLubyte *)vp);
 114       _mesa_reference_vertprog(ctx, &meta->passthrough_vp,
 115                                ctx->VertexProgram.Current);
 116       _mesa_DeletePrograms(1, &prog_name);
 117    }
 118
 119    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 120    _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
 121                             meta->passthrough_vp);
 122    ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
 123                            &meta->passthrough_vp->Base);
 124
 125    meta->saved_vp_enable = ctx->VertexProgram.Enabled;
 126    _mesa_Enable(GL_VERTEX_PROGRAM_ARB);
 127 }
 128
 129 /**
 130  * Restores the previous vertex program after
 131  * meta_set_passthrough_vertex_program()
 132  */
 133 void
 134 meta_restore_vertex_program(struct dri_metaops *meta)
 135 {
 136    GLcontext *ctx = meta->ctx;
 137
 138    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 139    _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
 140                             meta->saved_vp);
 141    _mesa_reference_vertprog(ctx, &meta->saved_vp, NULL);
 142    ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
 143                            &ctx->VertexProgram.Current->Base);
 144
 145    if (!meta->saved_vp_enable)
 146       _mesa_Disable(GL_VERTEX_PROGRAM_ARB);
 147 }
 148
 149 /**
 150  * Binds the given program string to GL_FRAGMENT_PROGRAM_ARB, caching the
 151  * program object.
 152  */
 153 void
 154 meta_set_fragment_program(struct dri_metaops *meta,
 155                           struct gl_fragment_program **prog,
 156                           const char *prog_string)
 157 {
 158    GLcontext *ctx = meta->ctx;
 159    assert(meta->saved_fp == NULL);
 160
 161    _mesa_reference_fragprog(ctx, &meta->saved_fp,
 162                             ctx->FragmentProgram.Current);
 163    if (*prog == NULL) {
 164       GLuint prog_name;
 165       _mesa_GenPrograms(1, &prog_name);
 166       _mesa_BindProgram(GL_FRAGMENT_PROGRAM_ARB, prog_name);
 167       _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB,
 168                              GL_PROGRAM_FORMAT_ASCII_ARB,
 169                              strlen(prog_string), (const GLubyte *)prog_string);
 170       _mesa_reference_fragprog(ctx, prog, ctx->FragmentProgram.Current);
 171       /* Note that DeletePrograms unbinds the program on us */
 172       _mesa_DeletePrograms(1, &prog_name);
 173    }
 174
 175    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 176    _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, *prog);
 177    ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, &((*prog)->Base));
 178
 179    meta->saved_fp_enable = ctx->FragmentProgram.Enabled;
 180    _mesa_Enable(GL_FRAGMENT_PROGRAM_ARB);
 181 }
 182
 183 /**
 184  * Restores the previous fragment program after
 185  * meta_set_fragment_program()
 186  */
 187 void
 188 meta_restore_fragment_program(struct dri_metaops *meta)
 189 {
 190    GLcontext *ctx = meta->ctx;
 191
 192    FLUSH_VERTICES(ctx, _NEW_PROGRAM);
 193    _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
 194                             meta->saved_fp);
 195    _mesa_reference_fragprog(ctx, &meta->saved_fp, NULL);
 196    ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB,
 197                            &ctx->FragmentProgram.Current->Base);
 198
 199    if (!meta->saved_fp_enable)
 200       _mesa_Disable(GL_FRAGMENT_PROGRAM_ARB);
 201 }
 202
 203 static const float default_texcoords[4][2] = { { 0.0, 0.0 },
 204                                                { 1.0, 0.0 },
 205                                                { 1.0, 1.0 },
 206                                                { 0.0, 1.0 } };
 207
 208 void
 209 meta_set_default_texrect(struct dri_metaops *meta)
 210 {
 211    GLcontext *ctx = meta->ctx;
 212    struct gl_client_array *old_texcoord_array;
 213
 214    meta->saved_active_texture = ctx->Texture.CurrentUnit;
 215    if (meta->saved_array_vbo == NULL) {
 216       _mesa_reference_buffer_object(ctx, &meta->saved_array_vbo,
 217                                     ctx->Array.ArrayBufferObj);
 218    }
 219
 220    old_texcoord_array = &ctx->Array.ArrayObj->TexCoord[0];
 221    meta->saved_texcoord_type = old_texcoord_array->Type;
 222    meta->saved_texcoord_size = old_texcoord_array->Size;
 223    meta->saved_texcoord_stride = old_texcoord_array->Stride;
 224    meta->saved_texcoord_enable = old_texcoord_array->Enabled;
 225    meta->saved_texcoord_ptr = old_texcoord_array->Ptr;
 226    _mesa_reference_buffer_object(ctx, &meta->saved_texcoord_vbo,
 227                                  old_texcoord_array->BufferObj);
 228
 229    _mesa_ClientActiveTextureARB(GL_TEXTURE0);
 230
 231    if (meta->texcoord_vbo == NULL) {
 232       GLuint vbo_name;
 233
 234       _mesa_GenBuffersARB(1, &vbo_name);
 235       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, vbo_name);
 236       _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(default_texcoords),
 237                           default_texcoords, GL_STATIC_DRAW_ARB);
 238       _mesa_reference_buffer_object(ctx, &meta->texcoord_vbo,
 239                                     ctx->Array.ArrayBufferObj);
 240    } else {
 241       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
 242                           meta->texcoord_vbo->Name);
 243    }
 244    _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), NULL);
 245
 246    _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
 247 }
 248
 249 void
 250 meta_restore_texcoords(struct dri_metaops *meta)
 251 {
 252    GLcontext *ctx = meta->ctx;
 253
 254    /* Restore the old TexCoordPointer */
 255    if (meta->saved_texcoord_vbo) {
 256       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
 257                           meta->saved_texcoord_vbo->Name);
 258       _mesa_reference_buffer_object(ctx, &meta->saved_texcoord_vbo, NULL);
 259    } else {
 260       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 261    }
 262
 263    _mesa_TexCoordPointer(meta->saved_texcoord_size,
 264                          meta->saved_texcoord_type,
 265                          meta->saved_texcoord_stride,
 266                          meta->saved_texcoord_ptr);
 267    if (!meta->saved_texcoord_enable)
 268       _mesa_Disable(GL_TEXTURE_COORD_ARRAY);
 269
 270    _mesa_ClientActiveTextureARB(GL_TEXTURE0 +
 271                                 meta->saved_active_texture);
 272
 273    if (meta->saved_array_vbo) {
 274       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
 275                           meta->saved_array_vbo->Name);
 276       _mesa_reference_buffer_object(ctx, &meta->saved_array_vbo, NULL);
 277    } else {
 278       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 279    }
 280 }
 281
 282
 283 void meta_init_metaops(GLcontext *ctx, struct dri_metaops *meta)
 284 {
 285    meta->ctx = ctx;
 286 }
 287
 288 void meta_destroy_metaops(struct dri_metaops *meta)
 289 {
 290
 291 }