X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=main.cpp;h=4853179c96111780bf3352887bc672918a349ba6;hp=8c28c8f6cbde8716efc16fc25c3bdfda25387e20;hb=f6c44598c9dad9ddd024c5f8f010d179a6d971fd;hpb=928743085b7f0f88b3e1b0e59e2d7ebec7816bd2

diff --git a/main.cpp b/main.cpp
index 8c28c8f..4853179 100644
--- a/main.cpp
+++ b/main.cpp
@@ -38,96 +38,6 @@ float lift_r = 0.0f, lift_g = 0.0f, lift_b = 0.0f;
 float gamma_r = 1.0f, gamma_g = 1.0f, gamma_b = 1.0f;
 float gain_r = 1.0f, gain_g = 1.0f, gain_b = 1.0f;
 
-GLhandleARB read_shader(const char* filename, GLenum type)
-{
-	std::string shader_src = read_file(filename);
-
-	GLhandleARB obj = glCreateShaderObjectARB(type);
-	const GLchar* source[] = { shader_src.data() };
-	const GLint length[] = { shader_src.size() };
-	glShaderSource(obj, 1, source, length);
-	glCompileShader(obj);
-
-	GLchar info_log[4096];
-	GLsizei log_length = sizeof(info_log) - 1;
-	glGetShaderInfoLog(obj, log_length, &log_length, info_log);
-	info_log[log_length] = 0; 
-	printf("shader compile log: %s\n", info_log);
-
-	GLint status;
-	glGetShaderiv(obj, GL_COMPILE_STATUS, &status);
-	if (status == GL_FALSE) {
-		exit(1);
-	}
-
-	return obj;
-}
-
-void draw_picture_quad(GLint prog, int frame)
-{
-	glUseProgramObjectARB(prog);
-	check_error();
-
-	glActiveTexture(GL_TEXTURE0);
-	glBindTexture(GL_TEXTURE_2D, SOURCE_IMAGE);
-	glUniform1i(glGetUniformLocation(prog, "tex"), 0);
-
-	glActiveTexture(GL_TEXTURE1);
-	glBindTexture(GL_TEXTURE_1D, SRGB_LUT);
-	glUniform1i(glGetUniformLocation(prog, "srgb_tex"), 1);
-
-	glActiveTexture(GL_TEXTURE2);
-	glBindTexture(GL_TEXTURE_1D, SRGB_REVERSE_LUT);
-	glUniform1i(glGetUniformLocation(prog, "srgb_reverse_tex"), 2);
-
-	glUniform3f(glGetUniformLocation(prog, "lift"), lift_r, lift_g, lift_b);
-	//glUniform3f(glGetUniformLocation(prog, "gamma"), gamma_r, gamma_g, gamma_b);
-	glUniform3f(glGetUniformLocation(prog, "inv_gamma_22"),
-	            2.2f / gamma_r,
-	            2.2f / gamma_g,
-	            2.2f / gamma_b);
-	glUniform3f(glGetUniformLocation(prog, "gain_pow_inv_gamma"),
-	            pow(gain_r, 1.0f / gamma_r),
-	            pow(gain_g, 1.0f / gamma_g),
-	            pow(gain_b, 1.0f / gamma_b));
-	glUniform1f(glGetUniformLocation(prog, "saturation"), saturation);
-
-	glDisable(GL_BLEND);
-	check_error();
-	glDisable(GL_DEPTH_TEST);
-	check_error();
-	glDepthMask(GL_FALSE);
-	check_error();
-
-	glMatrixMode(GL_PROJECTION);
-	glLoadIdentity();
-	glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0);
-
-	glMatrixMode(GL_MODELVIEW);
-	glLoadIdentity();
-
-	glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
-//	glClear(GL_COLOR_BUFFER_BIT);
-	check_error();
-
-	glBegin(GL_QUADS);
-
-	glTexCoord2f(0.0f, 1.0f);
-	glVertex2f(0.0f, 0.0f);
-
-	glTexCoord2f(1.0f, 1.0f);
-	glVertex2f(1.0f, 0.0f);
-
-	glTexCoord2f(1.0f, 0.0f);
-	glVertex2f(1.0f, 1.0f);
-
-	glTexCoord2f(0.0f, 0.0f);
-	glVertex2f(0.0f, 1.0f);
-
-	glEnd();
-	check_error();
-}
-
 void update_hsv()
 {
 	hsv2rgb(lift_theta, lift_rad, lift_v, &lift_r, &lift_g, &lift_b);
@@ -163,7 +73,7 @@ void mouse(int x, int y)
 	update_hsv();
 }
 
-void load_texture(const char *filename)
+unsigned char *load_image(const char *filename, unsigned *w, unsigned *h)
 {
 	SDL_Surface *img = IMG_Load(filename);
 	if (img == NULL) {
@@ -202,17 +112,30 @@ void load_texture(const char *filename)
 	}
 	SDL_UnlockSurface(img);
 
+	*w = img->w;
+	*h = img->h;
+
+	SDL_FreeSurface(img);
+
+	return dst_pixels;
+}
+
+void load_texture(const char *filename)
+{
+	unsigned w, h;
+	unsigned char *pixels = load_image(filename, &w, &h);
+
 #if 1
 	// we will convert to sRGB in the shader
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, img->w, img->h, 0, GL_RGB, GL_UNSIGNED_BYTE, dst_pixels);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
 	check_error();
 #else
 	// implicit sRGB conversion in hardware
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8, img->w, img->h, 0, GL_RGB, GL_UNSIGNED_BYTE, dst_pixels);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels);
 	check_error();
 #endif
-	free(dst_pixels);
-	SDL_FreeSurface(img);
+
+	free(pixels);
 }
 
 void write_ppm(const char *filename, unsigned char *screenbuf)
@@ -250,7 +173,21 @@ int main(int argc, char **argv)
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 	check_error();
 
-	load_texture("blg_wheels_woman_1.jpg");
+	unsigned img_w, img_h;
+	unsigned char *src_img = load_image("blg_wheels_woman_1.jpg", &img_w, &img_h);
+
+	EffectChain chain(WIDTH, HEIGHT);
+
+	ImageFormat inout_format;
+	inout_format.pixel_format = FORMAT_RGB;
+	inout_format.color_space = COLORSPACE_sRGB;
+	inout_format.gamma_curve = GAMMA_sRGB;
+
+	chain.add_input(inout_format);
+	Effect *lift_gamma_gain_effect = chain.add_effect(LIFT_GAMMA_GAIN);
+	chain.add_output(inout_format);
+	chain.finalize();
+
 	//glGenerateMipmap(GL_TEXTURE_2D);
 	//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 4);
 	//check_error();
@@ -306,8 +243,8 @@ int main(int argc, char **argv)
 	update_hsv();
 
 	int prog = glCreateProgram();
-	GLhandleARB vs_obj = read_shader("vs.glsl", GL_VERTEX_SHADER);
-	GLhandleARB fs_obj = read_shader("fs.glsl", GL_FRAGMENT_SHADER);
+	GLhandleARB vs_obj = compile_shader(read_file("vs.glsl"), GL_VERTEX_SHADER);
+	GLhandleARB fs_obj = compile_shader(read_file("fs.glsl"), GL_FRAGMENT_SHADER);
 	glAttachObjectARB(prog, vs_obj);
 	check_error();
 	glAttachObjectARB(prog, fs_obj);
@@ -344,7 +281,7 @@ int main(int argc, char **argv)
 
 		++frame;
 
-		draw_picture_quad(prog, frame);
+		chain.render_to_screen(src_img);
 		
 		glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 		check_error();