heart version, bmp output

App.h

@@ -11,10 +11,68 @@
 
 #include "stfu/stf.hpp"
 #include "pngwriter/pngwriter.h"
+#include "bmp.h"
 
 #include "shader.h"
 #include "fbo.h"
 
+static const unsigned int colors = 7;
+
+static const GLfloat color_transformations[][16] = {
+	{
+		1.0, 0.0, 0.0, 0.0,
+		0.0, 1.0, 0.0, 0.0,
+		0.0, 0.0, 1.0, 0.0,
+		0.0, 0.0, 0.0, 1.0
+	},
+	{
+		-0.1, -2.0, -0.9, 0.0,
+		-0.4, -0.5, -0.9, 0.0,
+		-2.0, -0.1, -0.9, 0.0,
+		0.0, 0.0, 0.0, 1.0
+	},
+	{
+		0.1, 0.0, -0.9, 0.0,
+		0.4, 1.0, 0.0, 0.0,
+		0.0, 0.1, 0.3, 0.0,
+		0.0, 0.0, 0.0, 1.0
+	},
+	{
+		0.5, -0.3, -0.5, 0.0,
+		0.5, 0.0, -0.5, 0.0,
+		0.5, 1.0, -0.5, 0.0,
+		0.0, 0.0, 0.0, 1.0
+	},
+	{
+		0.0, 0.0, 0.0, 0.0,
+		0.0, 0.0, 0.0, 0.0,
+		0.0, 0.0, 0.0, 0.0,
+		0.0, 0.0, 0.0, 1.0
+	},
+	{
+		5.0, -1.0, -5.0, 0.0,
+		-5.0, 5.0, -1.0, 0.0,
+		-1.0, -5.0, 5.0, 0.0,
+		0.0, 0.0, 0.0, 1.0
+	},
+	{
+		1.0, 1.0, 1.0, 0.0,
+		0.0, 1.0, 0.0, 0.0,
+		0.0, 1.0, 0.8, 0.0,
+		0.0, 0.0, 0.0, 1.0
+	}
+};
+
+static const GLfloat background_colors[][4] = {
+	{	0.0, 0.0, 0.0, 0.0	},
+	{	1.0, 1.0, 1.0, 0.0	},
+	{	0.4, 0.0, 0.0, 0.0	},
+	{	0.5, 0.5, 0.5, 0.0	},
+	{	0.0, 0.5, 0.1, 0.0	},
+	{	-0.5, -0.5, -0.5, 0.0},
+	{	0.1, 0.0, 0.2, 0.0}
+};
+
 static const GLfloat quad[] = {
 	1.0, 1.0,
 	1.0, -1.0,
@@ -27,10 +85,25 @@ static const GLfloat tex_quad[] = {
 	0.0, 0.0,
 	0.0, 1.0 };
 
+static const GLfloat heart[] = {
+	0.0,	0.3,
+	0.06,	0.45,
+	0.16,	0.5,
+	0.3,	0.4,
+	0.33,	0.25,
+	0.0,	-0.5,
+	-0.33,	0.25,
+	-0.3,	0.4,
+	-0.16,	0.5,
+	-0.06,	0.45,
+	-0.0,	0.3
+};
+
 class App {
 public:
-	int counter;
+	int counter, counter2;
 	unsigned int width, height;
+	unsigned int color_scheme;
 
 	shader mshader;
 	shader clear_shader;
@@ -42,10 +115,15 @@ public:
 	std::array<bool, 3> mouse_buttons;
 	std::array<GLfloat, 2> mouse;
 
+	std::array<GLfloat, 16> color_transformation;
+	std::array<GLfloat, 4> background_color;
+
 	App(unsigned int w, unsigned int h) :
 		counter(0),
+		counter2(0),
 		width(w),
 		height(h),
+		color_scheme(6),
 		mshader("resources/myTeaShader.vert", "resources/myTeaShader.frag"),
 		clear_shader("resources/myClearShader.vert", "resources/myClearShader.frag"),
 		texture_shader("resources/myTextureShader.vert", "resources/myTextureShader.frag"),
@@ -53,7 +131,9 @@ public:
 		fbo1(width, height),
 		fbo2(width, height),
 		mouse_buttons{{false, false, false}},
-		mouse{{0.0f, 0.0f}}{
+		mouse{{0.0f, 0.0f}},
+		color_transformation(),
+		background_color(){
 
 		//glEnable(GL_DEPTH_TEST);
 		glEnable(GL_BLEND);
@@ -67,16 +147,47 @@ public:
 		std::cout << w << "x" << h << std::endl;
 	}
 
+	void pressed(char x){
+		switch(x){
+			case ' ': save_bmp(); break;
+			case 'z': ++color_scheme %= colors; break;
+			default: break;
+		}
+	}
+
 	void update() {
 		++counter;
 		if(counter % 100 == 0){
 			std::cout << counter << std::endl;
 		}
+
+		const float fade_speed = 0.1;
+
+		for(unsigned int i = 0; i < color_transformation.size(); ++i)
+			color_transformation[i] = (1.0 - fade_speed)*color_transformation[i] + fade_speed*color_transformations[color_scheme][i];
+		for(unsigned int i = 0; i < background_color.size(); ++i)
+			background_color[i] = (1.0 - fade_speed)*background_color[i] + fade_speed*background_colors[color_scheme][i];
 	}
 
 	void draw() {
-		fbo & read_fbo = (counter % 2) ? fbo1 : fbo2;
+		for(int i = 0; i < 2; ++i)
-		fbo & draw_fbo = (counter % 2) ? fbo2 : fbo1;
+			magic();
+		auto const & draw_fbo = magic();
+
+		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+		texture_shader.begin();
+			texture_shader.set_matrix("color_transformation", true, &color_transformation[0]);
+			texture_shader.set_vector("background_color", &background_color[0]);
+			texture(texture_shader, draw_fbo);
+
+		//if(counter % 4 == 0)
+		//	save_bmp();
+	}
+
+	fbo const & magic(){
+		++counter2;
+		fbo & read_fbo = (counter2 % 2) ? fbo1 : fbo2;
+		fbo & draw_fbo = (counter2 % 2) ? fbo2 : fbo1;
 
 		glClearColor(0.0, 0.0, 0.0, 0.0);
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -87,7 +198,7 @@ public:
 		glClearColor(0.0, 0.0, 0.0, 0.0);
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		blur_shader.begin();
-			blur_shader.set_uniform("offset", (float) cos(counter) / width, (float) sin(counter) / height);
+			blur_shader.set_uniform("offset", (float) cos(counter2) / width * 2.0f, (float) sin(counter2) / height * 2.0f);
 			if(true){
 				blur_shader.set_uniform("fade", 0.75f);
 				blur_shader.set_uniform("inter", 0.55f);
@@ -101,12 +212,7 @@ public:
 			scene();
 		draw_fbo.end();
 
-		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+		return draw_fbo;
-		texture_shader.begin();
-			texture(texture_shader, draw_fbo);
-
-		if(counter % 4 == 0)
-			save_screen();
 	}
 
 	void fade() {
@@ -137,10 +243,20 @@ public:
 
 			glEnableClientState(GL_VERTEX_ARRAY);
 			glVertexPointer(2, GL_FLOAT, 0, &mouse[0]);
-			glPointSize(50.0);
+			glPointSize(50.0/1.0);
 			glDrawArrays(GL_POINTS, 0, 1);
 			glDisableClientState(GL_VERTEX_ARRAY);
 		}
+		if(counter < 50 || counter > 1200){
+			mshader.set_uniform("steps", counter/10);
+			mshader.set_uniform("button", counter % 4);
+
+			glEnableClientState(GL_VERTEX_ARRAY);
+			glVertexPointer(2, GL_FLOAT, 0, &heart[0]);
+			glLineWidth(15.0);
+			glDrawArrays(GL_LINE_STRIP, 0, 11);
+			glDisableClientState(GL_VERTEX_ARRAY);
+		}
 	}
 
 	void save_screen(){
@@ -153,6 +269,20 @@ public:
 		pngwriter png(width, height, &data[0], filename);
 		png.close();
 	}
+
+	void save_bmp(){
+		unsigned char data[width*height*3];
+		glReadPixels(0, 0, width, height, GL_BGR, GL_UNSIGNED_BYTE, data);
+
+		char filename[256];
+		sprintf(filename, "render/shot_%08d.bmp", counter);
+
+		bmp::bitmap<GLubyte> image(width, height);
+		image.data = data;
+
+		std::ofstream file(filename);
+		image.write(file);
+	}
 };
 
 #endif // APP_H

bmp.h

@@ -0,0 +1,75 @@
+#ifndef BMP_H
+#define BMP_H
+
+#include <iostream>
+#include <algorithm>
+#include <iterator>
+
+namespace bmp {
+
+struct bitmap_file_header {
+	uint32_t filesize;
+	uint16_t creator1;
+	uint16_t creator2;
+	uint32_t bmp_offset;
+
+	template <typename DIBT>
+	bitmap_file_header(DIBT dib_header):
+		filesize(dib_header.bytes() + dib_header.header_sz + 12 + 2),
+		creator1(0),
+		creator2(0),
+		bmp_offset(dib_header.header_sz + 12 + 2){}
+
+	void write(std::ostream& out) const {
+		out << "BM";
+		out.write(reinterpret_cast<const char*>(this), 12);
+	}
+};
+
+struct bitmapcoreheader {
+	uint32_t header_sz;
+	uint16_t width;
+	uint16_t height;
+	uint16_t nplanes;
+	uint16_t bitspp;
+
+	bitmapcoreheader(int width, int height):
+		header_sz(sizeof(bitmapcoreheader)),
+		width(width),
+		height(height),
+		nplanes(1),
+		bitspp(24){}
+
+	void write(std::ostream& out) const {
+		out.write(reinterpret_cast<const char*>(this), header_sz);
+	}
+
+	unsigned int bytes(){
+		return width*height*bitspp/8;
+	}
+};
+
+template <typename T, typename DIBT = bitmapcoreheader>
+struct bitmap {
+	DIBT dib_header;
+	bitmap_file_header header;
+	T const * data;
+
+	bitmap(int width, int height):
+		dib_header(width, height),
+		header(dib_header),
+		data(0) {
+	}
+
+	void write(std::ostream& out){
+		header.write(out);
+		dib_header.write(out);
+		std::copy_n((char const *)data, dib_header.bytes(), std::ostream_iterator<char>(out));
+	}
+
+};
+
+}
+
+#endif // BMP_H
+

globals.h

@@ -1,7 +1,7 @@
 #ifndef globals_h
 #define globals_h
 
-#define kWindowWidth	800
+#define kWindowWidth	1280
-#define kWindowHeight	600
+#define kWindowHeight	720
 
 #endif // globals_h

main.cpp

@@ -96,6 +96,9 @@ int main(int argc, char** argv) {
 						app_ptr->mouse[0] = x;
 						app_ptr->mouse[1] = y;
 	});
+	glutKeyboardFunc([](unsigned char x, int, int) {
+					app_ptr->pressed(x);
+	});
 	glutCloseFunc(end);			// freeglut extension
 
 	// my app-object

resources/myHBlurShader.frag

@@ -13,8 +13,8 @@ void main( void ) {
 	gl_FragColor *= fade;
 	//gl_FragColor = sin(gl_FragColor*3.0);
 
-	gl_FragColor -= 0.033*texture2D(tex, gl_TexCoord[0].st + 30.0*offset);
+	gl_FragColor -= 0.033*texture2D(tex, gl_TexCoord[0].st + 15.0*offset);
-	gl_FragColor -= 0.033*texture2D(tex, gl_TexCoord[0].st - 30.0*offset);
+	gl_FragColor -= 0.033*texture2D(tex, gl_TexCoord[0].st - 15.0*offset);
 
 	gl_FragColor.a = 1.0;
 }

resources/myHBlurShader.vert

@@ -1,5 +1,5 @@
 
 void main( void ) {
-	gl_TexCoord[0] = gl_MultiTexCoord0;
+	gl_TexCoord[0] = (gl_MultiTexCoord0 - vec4(0.5))/1.00 + vec4(0.5);
 	gl_Position = gl_Vertex;
 }

resources/myTeaShader.vert

@@ -4,14 +4,15 @@ uniform int button;
 
 void main( void ) {
 	gl_Position = gl_Vertex;
-	gl_Position.xy /= vec2(800, 600)*0.5;
+	gl_Position.xy *= vec2(1.0, 1.2);
+	/*gl_Position.xy /= vec2(1280, 720)*0.5;
 	gl_Position.xy -= 1.0;
-	gl_Position.y *= -1.0;
+	gl_Position.y *= -1.0;*/
 
 	if(button == 0)
 		color = vec4(1.0);
 	else if (button == 1)
-		color = vec4(0.0, 1.0, 1.0, 1.0);
+		color = vec4(0.1, 1.0, 0.9, 1.0);
 	else
-		color = vec4(0.0, 0.0, 1.0, 1.0);
+		color = vec4(0.0, 0.3, 1.0, 1.0);
 }

resources/myTextureShader.frag

@@ -1,16 +1,24 @@
 
 uniform sampler2D tex;
 
-void main( void ) {
+uniform vec4 background_color;
-	gl_FragColor = texture2D(tex, gl_TexCoord[0].st);
+uniform mat4 color_transformation;
 
+void main( void ) {
+	vec4 orig = texture2D(tex, gl_TexCoord[0].st);
+
+
+	gl_FragColor = background_color + color_transformation * orig;
+
+	{ // shine
 		vec2 offset = vec2(0.01, 0.0);
 
 		vec4 a = texture2D(tex, gl_TexCoord[0].st - offset);
 		vec4 b = texture2D(tex, gl_TexCoord[0].st + offset);
 
-	if(length(a-b) < 0.1 && length(gl_FragColor.rgb) > 0.3)
+		if(length(a-b) < 0.1 && length(orig.rgb) > 0.3)
 			gl_FragColor *= 1.0 + 0.01/length(a-b);
+	}
 
 	gl_FragColor.a = 1.0;
 }

shader.h

@@ -92,6 +92,14 @@ public:
 		glUniform4i(glGetUniformLocation(program, name), x, y, z, w);
 	}
 
+	void set_matrix(char const* name, bool trans, const GLfloat* value) const {
+		glUniformMatrix4fv(glGetUniformLocation(program, name), 1, trans, value);
+	}
+
+	void set_vector(char const* name, const GLfloat* value) const {
+		glUniform4fv(glGetUniformLocation(program, name), 1, value);
+	}
+
 	void set_texture(const char* name, GLenum target, GLuint tex, int textureLocation) const {
 		glActiveTexture(GL_TEXTURE0 + textureLocation);
 		glBindTexture(target, tex);