#define WIDTH 1280
#define HEIGHT 720
-#include <string.h>
-#include <math.h>
-#include <time.h>
-#include <sys/time.h>
-#include <assert.h>
-
-#include <string>
-#include <vector>
-#include <map>
-
+#include <GL/glew.h>
#include <SDL/SDL.h>
-#include <SDL/SDL_opengl.h>
+#include <SDL/SDL_error.h>
+#include <SDL/SDL_events.h>
#include <SDL/SDL_image.h>
+#include <SDL/SDL_keyboard.h>
+#include <SDL/SDL_keysym.h>
+#include <SDL/SDL_mouse.h>
+#include <SDL/SDL_video.h>
+#include <assert.h>
+#include <features.h>
+#include <math.h>
+#include <png.h>
+#include <pngconf.h>
+#include <setjmp.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <time.h>
+#include "diffusion_effect.h"
#include "effect.h"
#include "effect_chain.h"
-#include "util.h"
-#include "opengl.h"
-#include "widgets.h"
-
#include "flat_input.h"
+#include "image_format.h"
+#include "init.h"
#include "lift_gamma_gain_effect.h"
#include "saturation_effect.h"
-#include "diffusion_effect.h"
+#include "util.h"
+#include "widgets.h"
+
+using namespace movit;
unsigned char result[WIDTH * HEIGHT * 4];
return (unsigned char *)converted->pixels;
}
-void write_ppm(const char *filename, unsigned char *screenbuf)
+void write_png(const char *filename, unsigned char *screenbuf)
{
- FILE *fp = fopen(filename, "w");
- fprintf(fp, "P6\n%d %d\n255\n", WIDTH, HEIGHT);
+ FILE *fp = fopen(filename, "wb");
+ png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ png_infop info_ptr = png_create_info_struct(png_ptr);
+
+ if (setjmp(png_jmpbuf(png_ptr))) {
+ fclose(fp);
+ fprintf(stderr, "Write to %s failed; exiting.\n", filename);
+ exit(1);
+ }
+
+ png_set_IHDR(png_ptr, info_ptr, WIDTH, HEIGHT, 8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+
+ png_bytep *row_pointers = new png_bytep[HEIGHT];
for (unsigned y = 0; y < HEIGHT; ++y) {
- unsigned char *srcptr = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
- for (unsigned x = 0; x < WIDTH; ++x) {
- fputc(srcptr[x * 4 + 2], fp);
- fputc(srcptr[x * 4 + 1], fp);
- fputc(srcptr[x * 4 + 0], fp);
- }
+ row_pointers[y] = screenbuf + ((HEIGHT - y - 1) * WIDTH) * 4;
}
+
+ png_init_io(png_ptr, fp);
+ png_set_rows(png_ptr, info_ptr, row_pointers);
+ png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_BGR, NULL);
+ png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(fp);
+
+ delete[] row_pointers;
}
int main(int argc, char **argv)
{
- int quit = 0;
+ bool quit = false;
- SDL_Init(SDL_INIT_EVERYTHING);
+ if (SDL_Init(SDL_INIT_EVERYTHING) == -1) {
+ fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
+ exit(1);
+ }
+ SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_SetVideoMode(WIDTH, HEIGHT, 0, SDL_OPENGL);
SDL_WM_SetCaption("OpenGL window", NULL);
-
- // geez
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ CHECK(init_movit(".", MOVIT_DEBUG_ON));
+ printf("GPU texture subpixel precision: about %.1f bits\n",
+ log2(1.0f / movit_texel_subpixel_precision));
+ printf("Wrongly rounded x+0.48 or x+0.52 values: %d/510\n",
+ movit_num_wrongly_rounded);
+ if (movit_num_wrongly_rounded > 0) {
+ if (movit_shader_rounding_supported) {
+ printf("Rounding off in the shader to compensate.\n");
+ } else {
+ printf("No shader roundoff available; cannot compensate.\n");
+ }
+ }
+
unsigned img_w, img_h;
- unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
+ unsigned char *src_img = load_image(argc > 1 ? argv[1] : "blg_wheels_woman_1.jpg", &img_w, &img_h);
EffectChain chain(WIDTH, HEIGHT);
+ glViewport(0, 0, WIDTH, HEIGHT);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0);
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
ImageFormat inout_format;
inout_format.color_space = COLORSPACE_sRGB;
inout_format.gamma_curve = GAMMA_sRGB;
- FlatInput *input = new FlatInput(inout_format, FORMAT_BGRA, GL_UNSIGNED_BYTE, img_w, img_h);
+ FlatInput *input = new FlatInput(inout_format, FORMAT_BGRA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, img_w, img_h);
chain.add_input(input);
Effect *lift_gamma_gain_effect = chain.add_effect(new LiftGammaGainEffect());
Effect *saturation_effect = chain.add_effect(new SaturationEffect());
//Effect *sandbox_effect = chain.add_effect(new SandboxEffect());
//sandbox_effect->set_float("parm", 42.0f);
//chain.add_effect(new MirrorEffect());
- chain.add_output(inout_format);
+ chain.add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
+ chain.set_dither_bits(8);
chain.finalize();
// generate a PBO to hold the data we read back with glReadPixels()
make_hsv_wheel_texture();
- int frame = 0, screenshot = 0;
+ int frame = 0;
+ bool screenshot = false;
#if _POSIX_C_SOURCE >= 199309L
struct timespec start, now;
clock_gettime(CLOCK_MONOTONIC, &start);
SDL_Event event;
while (SDL_PollEvent(&event)) {
if (event.type == SDL_QUIT) {
- quit = 1;
+ quit = true;
} else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE) {
- quit = 1;
+ quit = true;
} else if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_F1) {
- screenshot = 1;
+ screenshot = true;
} else if (event.type == SDL_MOUSEBUTTONDOWN && event.button.button == SDL_BUTTON_LEFT) {
mouse(event.button.x, event.button.y);
} else if (event.type == SDL_MOUSEMOTION && (event.motion.state & SDL_BUTTON(1))) {
//vignette_effect->set_float("inner_radius", inner_radius);
//vignette_effect->set_vec2("center", (float[]){ 0.7f, 0.5f });
- diffusion_effect->set_float("radius", blur_radius);
- diffusion_effect->set_float("blurred_mix_amount", blurred_mix_amount);
+ CHECK(diffusion_effect->set_float("radius", blur_radius));
+ CHECK(diffusion_effect->set_float("blurred_mix_amount", blurred_mix_amount));
input->set_pixel_data(src_img);
chain.render_to_screen();
check_error();
if (screenshot) {
char filename[256];
- sprintf(filename, "frame%05d.ppm", frame);
- write_ppm(filename, screenbuf);
+ sprintf(filename, "frame%05d.png", frame);
+ write_png(filename, screenbuf);
printf("Screenshot: %s\n", filename);
- screenshot = 0;
+ screenshot = false;
}
glUnmapBuffer(GL_PIXEL_PACK_BUFFER_ARB);
check_error();
printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
frame, elapsed, frame / elapsed,
1e3 * elapsed / frame);
+
+ // Reset every 100 frames, so that local variations in frame times
+ // (especially for the first few frames, when the shaders are
+ // compiled etc.) don't make it hard to measure for the entire
+ // remaining duration of the program.
+ if (frame == 100) {
+ frame = 0;
+ start = now;
+ }
#endif
}
return 0;
projects / movit / blobdiff