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comparison dmglrender.cpp @ 91:4df8a7337e3e

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Add simple 32bit texture version.
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 18 Jan 2021 12:23:48 +0200
parents 3863ad92f8d8
children 28dd29f3a65f
comparison
equal deleted inserted replaced
90:3863ad92f8d8 91:4df8a7337e3e
175 "########" 175 "########"
176 "##....##" 176 "##....##"
177 "##....##" 177 "##....##"
178 "##....##"; 178 "##....##";
179 179
180 static Uint32 texSrc32[TWIDTH * THEIGHT];
181
180 182
181 bool DMGLSimpleRenderer::initRenderer2(void) 183 bool DMGLSimpleRenderer::initRenderer2(void)
182 { 184 {
183 // Dump some information 185 // Dump some information
184 dmMsg("GL_VENDOR : %s\n", glGetString(GL_VENDOR)); 186 dmMsg("GL_VENDOR : %s\n", glGetString(GL_VENDOR));
226 // Set correct perspective correction 228 // Set correct perspective correction
227 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); 229 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
228 230
229 231
230 // Create texture bitmap 232 // Create texture bitmap
231
232 for (int yc = 0; yc < THEIGHT; yc++) 233 for (int yc = 0; yc < THEIGHT; yc++)
233 { 234 {
234 Uint8 *dp8 = ((Uint8 *) texSrc8) + yc * TWIDTH; 235 Uint8 *dp8 = ((Uint8 *) texSrc8) + yc * TWIDTH;
236 Uint32 *dp32 = ((Uint32 *) texSrc32) + yc * TWIDTH;
235 237
236 for (int xc = 0; xc < TWIDTH; xc++) 238 for (int xc = 0; xc < TWIDTH; xc++)
237 { 239 {
238 Uint8 col = dp8[xc]; 240 Uint8 col = dp8[xc];
239 switch (col) 241 switch (col)
242 case '#': col = 255; break; 244 case '#': col = 255; break;
243 case '*': col = 128; break; 245 case '*': col = 128; break;
244 default: col = 192; break; 246 default: col = 192; break;
245 } 247 }
246 dp8[xc] = col; 248 dp8[xc] = col;
249 dp32[xc] = col | (col << 8) | (col << 16);
247 } 250 }
248 } 251 }
249 252
250 // Upload to GPU texture 253 // Upload to GPU texture
251 glGenTextures(1, &tex8); 254 glGenTextures(1, &tex8);
253 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 256 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
254 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 257 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
255 glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, TWIDTH, THEIGHT, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, texSrc8); 258 glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, TWIDTH, THEIGHT, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, texSrc8);
256 glBindTexture(GL_TEXTURE_2D, 0); 259 glBindTexture(GL_TEXTURE_2D, 0);
257 260
261 glGenTextures(2, &tex32);
262 glBindTexture(GL_TEXTURE_2D, tex32);
263 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
264 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
265 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, TWIDTH, THEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, texSrc32);
266 glBindTexture(GL_TEXTURE_2D, 0);
267
258 return checkErrors(); 268 return checkErrors();
259 } 269 }
260 270
261 271
262 bool DMGLSimpleRenderer::compileModelShaders(DMModel &model) 272 bool DMGLSimpleRenderer::compileModelShaders(DMModel &model)
341 } 351 }
342 352
343 353
344 void DMGLSimpleRenderer::drawScene(const DMSimpleScene &scene, const float time) 354 void DMGLSimpleRenderer::drawScene(const DMSimpleScene &scene, const float time)
345 { 355 {
356 float qx, qy, qw, qh;
357
346 glClear(GL_DEPTH_BUFFER_BIT); 358 glClear(GL_DEPTH_BUFFER_BIT);
347 359
348 glMatrixMode(GL_PROJECTION); 360 glMatrixMode(GL_PROJECTION);
349 glPushMatrix(); 361 glPushMatrix();
350 glLoadIdentity(); 362 glLoadIdentity();
368 glVertex2f(1.0f, 1.0f); 380 glVertex2f(1.0f, 1.0f);
369 glVertex2f(0.0f, 1.0f); 381 glVertex2f(0.0f, 1.0f);
370 } 382 }
371 glEnd(); 383 glEnd();
372 384
373 // Draw texture 385 // Draw texture #1
374 glColor3ub(0xff, 0xff, 0xff); 386 glColor3ub(0xff, 0xff, 0xff);
387
388 qh = 0.35f;
389 qw = qh * 0.6f;
390 qx = 0;
391 qy = 0;
392
375 glEnable(GL_TEXTURE_2D); 393 glEnable(GL_TEXTURE_2D);
376 glBindTexture(GL_TEXTURE_2D, tex8); 394 glBindTexture(GL_TEXTURE_2D, tex8);
377 glBegin(GL_QUADS); 395 glBegin(GL_QUADS);
378 float s = 0.50f; 396 glTexCoord2i(-1, 0); glVertex2f(qx , qy);
379 glTexCoord2i(-1, 0); glVertex2f(0, 0); 397 glTexCoord2i( 0, 0); glVertex2f(qx + qw, qy);
380 glTexCoord2i( 0, 0); glVertex2f(s * 0.6f, 0); 398 glTexCoord2i( 0, -1); glVertex2f(qx + qw, qy + qh);
381 glTexCoord2i( 0, -1); glVertex2f(s * 0.6f, s); 399 glTexCoord2i(-1, -1); glVertex2f(qx , qy + qh);
382 glTexCoord2i(-1, -1); glVertex2f(0, s); 400 glEnd();
401
402 // Draw texture #2
403 qh = 0.25f;
404 qw = qh * 0.6f;
405 qx = 1.0f - qw;
406 qy = 1.0f - qh;
407
408 glBindTexture(GL_TEXTURE_2D, tex32);
409 glBegin(GL_QUADS);
410 glTexCoord2i(-1, 0); glVertex2f(qx , qy);
411 glTexCoord2i( 0, 0); glVertex2f(qx + qw, qy);
412 glTexCoord2i( 0, -1); glVertex2f(qx + qw, qy + qh);
413 glTexCoord2i(-1, -1); glVertex2f(qx , qy + qh);
383 glEnd(); 414 glEnd();
384 glBindTexture(GL_TEXTURE_2D, 0); 415 glBindTexture(GL_TEXTURE_2D, 0);
385 glDisable(GL_TEXTURE_2D); 416 glDisable(GL_TEXTURE_2D);
386 417
387 // Restore the 3D projection 418 // Restore the 3D projection