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comparison render_sdl.c @ 2390:9264c847ceb7

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Add some uniforms to allow more sophisticated interlace and scanline handling in shaders
author Michael Pavone <pavone@retrodev.com>
date Sat, 25 Nov 2023 11:54:56 -0800
parents a8c069d847a0
children a71176b9903d
comparison
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2389:66b3f2eda0c8 2390:9264c847ceb7
301 } 301 }
302 } 302 }
303 303
304 static int tex_width, tex_height; 304 static int tex_width, tex_height;
305 #ifndef DISABLE_OPENGL 305 #ifndef DISABLE_OPENGL
306 static GLuint textures[3], buffers[2], vshader, fshader, program, un_textures[2], un_width, un_height, un_texsize, at_pos; 306 static GLuint textures[3], buffers[2], vshader, fshader, program;
307 static GLint un_textures[2], un_width, un_height, un_texsize, un_curfield, un_interlaced, un_scanlines, at_pos;
307 308
308 static GLfloat vertex_data_default[] = { 309 static GLfloat vertex_data_default[] = {
309 -1.0f, -1.0f, 310 -1.0f, -1.0f,
310 1.0f, -1.0f, 311 1.0f, -1.0f,
311 -1.0f, 1.0f, 312 -1.0f, 1.0f,
455 un_textures[0] = glGetUniformLocation(program, "textures[0]"); 456 un_textures[0] = glGetUniformLocation(program, "textures[0]");
456 un_textures[1] = glGetUniformLocation(program, "textures[1]"); 457 un_textures[1] = glGetUniformLocation(program, "textures[1]");
457 un_width = glGetUniformLocation(program, "width"); 458 un_width = glGetUniformLocation(program, "width");
458 un_height = glGetUniformLocation(program, "height"); 459 un_height = glGetUniformLocation(program, "height");
459 un_texsize = glGetUniformLocation(program, "texsize"); 460 un_texsize = glGetUniformLocation(program, "texsize");
461 un_curfield = glGetUniformLocation(program, "curfield");
462 un_interlaced = glGetUniformLocation(program, "interlaced");
463 un_scanlines = glGetUniformLocation(program, "scanlines");
460 at_pos = glGetAttribLocation(program, "pos"); 464 at_pos = glGetAttribLocation(program, "pos");
461 } 465 }
462 466
463 static void gl_teardown() 467 static void gl_teardown()
464 { 468 {
1580 #else 1584 #else
1581 #define FPS_INTERVAL 1000 1585 #define FPS_INTERVAL 1000
1582 #endif 1586 #endif
1583 1587
1584 static uint32_t last_width, last_height; 1588 static uint32_t last_width, last_height;
1585 static uint8_t interlaced; 1589 static uint8_t interlaced, last_field;
1586 static void process_framebuffer(uint32_t *buffer, uint8_t which, int width) 1590 static void process_framebuffer(uint32_t *buffer, uint8_t which, int width)
1587 { 1591 {
1588 static uint8_t last;
1589 if (sync_src == SYNC_VIDEO && which <= FRAMEBUFFER_EVEN && source_frame_count < 0) { 1592 if (sync_src == SYNC_VIDEO && which <= FRAMEBUFFER_EVEN && source_frame_count < 0) {
1590 source_frame++; 1593 source_frame++;
1591 if (source_frame >= source_hz) { 1594 if (source_frame >= source_hz) {
1592 source_frame = 0; 1595 source_frame = 0;
1593 } 1596 }
1614 warning("Failed to open screenshot file %s for writing\n", screenshot_path); 1617 warning("Failed to open screenshot file %s for writing\n", screenshot_path);
1615 } 1618 }
1616 free(screenshot_path); 1619 free(screenshot_path);
1617 screenshot_path = NULL; 1620 screenshot_path = NULL;
1618 } 1621 }
1619 interlaced = last != which; 1622 interlaced = last_field != which;
1620 buffer += overscan_left[video_standard] + LINEBUF_SIZE * overscan_top[video_standard]; 1623 buffer += overscan_left[video_standard] + LINEBUF_SIZE * overscan_top[video_standard];
1621 #ifndef DISABLE_OPENGL 1624 #ifndef DISABLE_OPENGL
1622 if (render_gl && which <= FRAMEBUFFER_EVEN) { 1625 if (render_gl && which <= FRAMEBUFFER_EVEN) {
1623 SDL_GL_MakeCurrent(main_window, main_context); 1626 SDL_GL_MakeCurrent(main_window, main_context);
1624 glBindTexture(GL_TEXTURE_2D, textures[which]); 1627 glBindTexture(GL_TEXTURE_2D, textures[which]);
1649 #endif 1652 #endif
1650 } else { 1653 } else {
1651 #endif 1654 #endif
1652 uint32_t shot_height = height; 1655 uint32_t shot_height = height;
1653 //TODO: Support SYNC_AUDIO_THREAD/SYNC_EXTERNAL for render API framebuffers 1656 //TODO: Support SYNC_AUDIO_THREAD/SYNC_EXTERNAL for render API framebuffers
1654 if (which <= FRAMEBUFFER_EVEN && last != which) { 1657 if (which <= FRAMEBUFFER_EVEN && last_field != which) {
1655 uint8_t *cur_dst = (uint8_t *)locked_pixels; 1658 uint8_t *cur_dst = (uint8_t *)locked_pixels;
1656 uint8_t *cur_saved = (uint8_t *)texture_buf; 1659 uint8_t *cur_saved = (uint8_t *)texture_buf;
1657 uint32_t dst_off = which == FRAMEBUFFER_EVEN ? 0 : locked_pitch; 1660 uint32_t dst_off = which == FRAMEBUFFER_EVEN ? 0 : locked_pitch;
1658 uint32_t src_off = which == FRAMEBUFFER_EVEN ? locked_pitch : 0; 1661 uint32_t src_off = which == FRAMEBUFFER_EVEN ? locked_pitch : 0;
1659 for (int i = 0; i < height; ++i) 1662 for (int i = 0; i < height; ++i)
1709 } 1712 }
1710 if (screenshot_file) { 1713 if (screenshot_file) {
1711 fclose(screenshot_file); 1714 fclose(screenshot_file);
1712 } 1715 }
1713 if (which <= FRAMEBUFFER_EVEN) { 1716 if (which <= FRAMEBUFFER_EVEN) {
1714 last = which; 1717 last_field = which;
1715 static uint32_t frame_counter, start; 1718 static uint32_t frame_counter, start;
1716 frame_counter++; 1719 frame_counter++;
1717 last_frame= SDL_GetTicks(); 1720 last_frame= SDL_GetTicks();
1718 if ((last_frame - start) > FPS_INTERVAL) { 1721 if ((last_frame - start) > FPS_INTERVAL) {
1719 if (start && (last_frame-start)) { 1722 if (start && (last_frame-start)) {
1884 glActiveTexture(GL_TEXTURE0); 1887 glActiveTexture(GL_TEXTURE0);
1885 glBindTexture(GL_TEXTURE_2D, textures[0]); 1888 glBindTexture(GL_TEXTURE_2D, textures[0]);
1886 glUniform1i(un_textures[0], 0); 1889 glUniform1i(un_textures[0], 0);
1887 1890
1888 glActiveTexture(GL_TEXTURE1); 1891 glActiveTexture(GL_TEXTURE1);
1889 glBindTexture(GL_TEXTURE_2D, textures[interlaced ? 1 : scanlines ? 2 : 0]); 1892 int bot_texture = 2; //black texture
1893 if (interlaced) {
1894 bot_texture = 1;
1895 } else if (!scanlines && un_scanlines == -1) {
1896 bot_texture = 0;
1897 }
1898 glBindTexture(GL_TEXTURE_2D, textures[bot_texture]);
1890 glUniform1i(un_textures[1], 1); 1899 glUniform1i(un_textures[1], 1);
1891 1900
1892 glUniform1f(un_width, render_emulated_width()); 1901 glUniform1f(un_width, render_emulated_width());
1893 glUniform1f(un_height, last_height); 1902 glUniform1f(un_height, last_height);
1894 glUniform2f(un_texsize, tex_width, tex_height); 1903 glUniform2f(un_texsize, tex_width, tex_height);
1904 if (un_curfield != -1) {
1905 glUniform1i(un_curfield, last_field);
1906 }
1907 if (un_interlaced != -1) {
1908 glUniform1i(un_interlaced, interlaced);
1909 }
1910 if (un_scanlines != -1) {
1911 glUniform1i(un_scanlines, scanlines);
1912 }
1895 1913
1896 glBindBuffer(GL_ARRAY_BUFFER, buffers[0]); 1914 glBindBuffer(GL_ARRAY_BUFFER, buffers[0]);
1897 glVertexAttribPointer(at_pos, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat[2]), (void *)0); 1915 glVertexAttribPointer(at_pos, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat[2]), (void *)0);
1898 glEnableVertexAttribArray(at_pos); 1916 glEnableVertexAttribArray(at_pos);
1899 1917