Add files via upload

Author: JingShing

crt_shader.py

@@ -0,0 +1,55 @@
+import struct
+import pygame
+from pygame.locals import *
+from settings import *
+import moderngl
+
+class Graphic_engine:
+ # you need to give this class screen
+ # screen is a Surface you declare to replace display
+ def __init__(self, screen):
+ pygame.init()
+ self.screen = screen
+ self.ctx = moderngl.create_context()
+ self.texture_coordinates = [0, 1, 1, 1,
+ 0, 0, 1, 0]
+ self.world_coordinates = [-1, -1, 1, -1,
+ -1, 1, 1, 1]
+ self.render_indices = [0, 1, 2,
+ 1, 2, 3]
+
+ self.prog = self.ctx.program(
+ vertex_shader=open('shaders/VERTEX_SHADER.glsl').read(),
+ fragment_shader=open('shaders/FRAGMENT_SHADER.glsl').read(),
+ )
+
+ self.screen_texture = self.ctx.texture(
+ VIRTUAL_RES, 3,
+ pygame.image.tostring(screen, "RGB", 1)
+ )
+
+ self.screen_texture.repeat_x = False
+ self.screen_texture.repeat_y = False
+
+ self.vbo = self.ctx.buffer(struct.pack('8f', *self.world_coordinates))
+ self.uvmap = self.ctx.buffer(struct.pack('8f', *self.texture_coordinates))
+ self.ibo= self.ctx.buffer(struct.pack('6I', *self.render_indices))
+
+ self.vao_content = [
+ (self.vbo, '2f', 'vert'),
+ (self.uvmap, '2f', 'in_text')
+ ]
+
+ self.vao = self.ctx.vertex_array(self.prog, self.vao_content, self.ibo)
+
+ def render(self):
+ # render will do all the work and update the screen
+ texture_data = self.screen.get_view('1')
+ self.screen_texture.write(texture_data)
+ self.ctx.clear(14/255,40/255,66/255)
+ self.screen_texture.use()
+ self.vao.render()
+ pygame.display.flip()
+ 
+ def __call__(self):
+ return self.render()

example.py

@@ -0,0 +1,33 @@
+import pygame
+from pygame.locals import *
+from crt_shader import Graphic_engine
+from settings import *
+
+# pygame initialize
+pygame.init()
+clock = pygame.time.Clock()
+
+# as usual you will create a display and give it a name
+# i named my display as screen
+# and you need to give it a Surface to replace old display
+screen = pygame.Surface(VIRTUAL_RES).convert((255, 65282, 16711681, 0))
+# you need to give your display OPENGL flag to blit screen using OPENGL
+pygame.display.set_mode(REAL_RES, DOUBLEBUF|OPENGL)
+
+# init shader class
+crt_shader = Graphic_engine(screen)
+
+#MAIN LOOP
+while (1):
+ for event in pygame.event.get():
+ if event.type == QUIT: 
+ pygame.quit()
+
+ # you need to put a image in your folder
+ img = pygame.image.load('image.png').convert()
+ # if you want to render a image on display just blit on screen
+ screen.blit(img, (0, 0))
+
+ # never forget to render your shader
+ crt_shader()
+ clock.tick(FPS)

image.png

@@ -0,0 +1,4 @@
+# simple settings
+VIRTUAL_RES = (800, 600)
+REAL_RES=(1080, 720)
+FPS=30

settings.py

@@ -0,0 +1,26 @@
+#version 300 es
+precision mediump float;
+uniform sampler2D Texture;
+
+out vec4 color;
+in vec2 v_text;
+void main() {
+ vec2 center = vec2(0.5, 0.5);
+ vec2 off_center = v_text - center;
+
+ off_center *= 1.0 + 0.8 * pow(abs(off_center.yx), vec2(2.7));
+ // 1.0 -> 1.5 make distance to screen
+ // vec 2 -> screen flatness
+
+ vec2 v_text2 = center+off_center;
+
+ if (v_text2.x > 1.0 || v_text2.x < 0.0 ||
+ v_text2.y > 1.0 || v_text2.y < 0.0){
+ color=vec4(0.0, 0.0, 0.0, 1.0);
+ } else {
+ color = vec4(texture(Texture, v_text2).rgb, 1.0);
+ float fv = fract(v_text2.y * float(textureSize(Texture,0).y));
+ fv=min(1.0, 0.8+0.5*min(fv, 1.0-fv));
+ color.rgb*=fv;
+ }
+}

shaders/FRAGMENT_SHADER.glsl

@@ -0,0 +1,8 @@
+#version 300 es
+in vec2 vert;
+in vec2 in_text;
+out vec2 v_text;
+void main() {
+ gl_Position = vec4(vert, 0.0, 1.0);
+ v_text = in_text;
+}