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comparison render_sdl.c @ 489:e97b80e3bd76 opengl

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Support interlace mode with OpenGL backend
author Mike Pavone <pavone@retrodev.com>
date Sun, 27 Oct 2013 21:41:21 -0700
parents 32f053ad9b02
children c8e65962bfed
comparison
equal deleted inserted replaced
488:32f053ad9b02 489:e97b80e3bd76
158 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 158 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
159 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 159 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
160 if (i < 2) { 160 if (i < 2) {
161 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 512, 256, 0, GL_BGRA, GL_UNSIGNED_BYTE, i ? context->evenbuf : context->oddbuf); 161 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 512, 256, 0, GL_BGRA, GL_UNSIGNED_BYTE, i ? context->evenbuf : context->oddbuf);
162 } else { 162 } else {
163 uint32_t blank = 255; 163 uint32_t blank = 255 << 24;
164 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 1, 1, 0, GL_BGRA, GL_UNSIGNED_BYTE, &blank); 164 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 1, 1, 0, GL_BGRA, GL_UNSIGNED_BYTE, &blank);
165 } 165 }
166 } 166 }
167 glGenBuffers(2, buffers); 167 glGenBuffers(2, buffers);
168 glBindBuffer(GL_ARRAY_BUFFER, buffers[0]); 168 glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
330 glActiveTexture(GL_TEXTURE0); 330 glActiveTexture(GL_TEXTURE0);
331 glBindTexture(GL_TEXTURE_2D, textures[0]); 331 glBindTexture(GL_TEXTURE_2D, textures[0]);
332 glUniform1i(un_textures[0], 0); 332 glUniform1i(un_textures[0], 0);
333 333
334 glActiveTexture(GL_TEXTURE1); 334 glActiveTexture(GL_TEXTURE1);
335 //TODO: Select appropriate texture based on status of interlace 335 glBindTexture(GL_TEXTURE_2D, (context->regs[REG_MODE_4] & BIT_INTERLACE) ? textures[1] : textures[2]);
336 glBindTexture(GL_TEXTURE_2D, textures[1]);
337 glUniform1i(un_textures[1], 1); 336 glUniform1i(un_textures[1], 1);
338 337
339 glBindBuffer(GL_ARRAY_BUFFER, buffers[0]); 338 glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
340 glVertexAttribPointer(at_pos, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat[2]), (void *)0); 339 glVertexAttribPointer(at_pos, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat[2]), (void *)0);
341 glEnableVertexAttribArray(at_pos); 340 glEnableVertexAttribArray(at_pos);
344 glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_SHORT, (void *)0); 343 glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_SHORT, (void *)0);
345 344
346 glDisableVertexAttribArray(at_pos); 345 glDisableVertexAttribArray(at_pos);
347 346
348 SDL_GL_SwapBuffers(); 347 SDL_GL_SwapBuffers();
349 348 if (context->regs[REG_MODE_4] & BIT_INTERLACE)
349 {
350 context->framebuf = context->framebuf == context->oddbuf ? context->evenbuf : context->oddbuf;
351 }
350 } 352 }
351 353
352 uint32_t blankbuf[320*240]; 354 uint32_t blankbuf[320*240];
353 355
354 void render_context(vdp_context * context) 356 void render_context(vdp_context * context)