Initial text support implementation, pt. II.

Switch from fixed-function pipeline to shaders.

ENNTool.py

@@ -10,7 +10,7 @@
 # 3) -s: effects: rotate, smash into bricks, swirl, wave, ...
 # 4) XXX autodetect video width from widest mircart
 # 5) XXX convert TTF to texture PNG & coords TXT, render accordingly
-# 6) XXX dont stall GPU w/ glReadPixels(), switch to asynchronous model w/ PBOs
+# 6) XXX dont stall GPU w/ glReadPixels(), switch to asynchronous model w/ FBO or PBO (http://www.songho.ca/opengl/gl_fbo.html, http://www.songho.ca/opengl/gl_pbo.html)
 # 7) XXX render mircart as 3D blocks vs flat surface
 #
 
@@ -91,8 +91,8 @@ class ENNToolApp(object):
                 MiRCART += ENNToolMiRCARTImporter(inFile).outMap
 
         curY, rotateX, rotateY, translateY = 0, 0, 0, scrollRate
-        artTextureId = panelGLCanvas.initTexture(texturePathName)
-        artVbo, artVboLen, lastY, numVertices = panelGLCanvas.renderMiRCART(MiRCART, cubeSize=optdict["-R"])
+        artTextureId, artInfo = panelGLCanvas.initTexture(texturePathName)
+        artVbo, artVboLen, lastY, numVertices = panelGLCanvas.renderMiRCART(artInfo, MiRCART, cubeSize=optdict["-R"])
         if "-v" in optdict:
             print("{} vertices".format(numVertices))
         w, h = panelGLCanvas.GetClientSize(); w, h = max(w, 1.0), max(h, 1.0);
@@ -121,7 +121,9 @@ class ENNToolApp(object):
 
         videoFps, videoPath = int(optdict["-f"]), optdict["-o"]
         panelGLCanvas = ENNToolGLCanvasPanel(appPanelSkin, size=appFrameSize, videoPath=videoPath)
-        panelGLCanvas.initOpenGL(); panelGLCanvas.initVideoWriter(fps=videoFps)
+        panelGLCanvas.initOpenGL()
+        panelGLCanvas.initShaders()
+        panelGLCanvas.initVideoWriter(fps=videoFps)
 
         if "-v" in optdict:
             time0 = time.time()

ENNToolGLCanvasPanel.py

@@ -10,13 +10,20 @@
 # Wed, 27 Jun 2018 16:02:12 +0200 [3] <https://www.khronos.org/opengl/wiki/How_lighting_works#Good_Settings.>
 # Wed, 27 Jun 2018 16:02:13 +0200 [4] <https://www.khronos.org/opengl/wiki/Common_Mistakes>
 # Wed, 27 Jun 2018 16:02:14 +0200 [5] <https://www.khronos.org/opengl/wiki/Pixel_Transfer#Pixel_layout>
+# Thu, 28 Jun 2018 17:03:16 +0200 [6] <https://stackoverflow.com/questions/384759/how-to-convert-a-pil-image-into-a-numpy-array>
+# Thu, 28 Jun 2018 17:04:59 +0200 [7] <https://www.khronos.org/opengl/wiki/Common_Mistakes#y-axis>
+# Thu, 28 Jun 2018 18:32:50 +0200 [8] <https://stackoverflow.com/questions/18935203/shader-position-vec4-or-vec3>
 #
 
 from OpenGL.GL import *
+from OpenGL.GL import shaders
 from PIL import Image
 import cv2, numpy
-import ctypes, sys
+import ctypes, os, sys, time
 import wx, wx.glcanvas
+import yaml
+
+from ENNToolMiRCARTColours import ENNToolMiRCARTColoursFloat
 
 class ENNToolGLCanvasPanel(wx.glcanvas.GLCanvas, wx.Panel):
     """XXX"""
@@ -34,22 +41,56 @@ class ENNToolGLCanvasPanel(wx.glcanvas.GLCanvas, wx.Panel):
         glEnable(GL_DEPTH_TEST)
         glClearColor(0, 0, 0, 1); glClearDepth(1);
         glTranslatef(-5.0, 3.0, -5)
-
-        # [3]
-        glLight(GL_LIGHT0, GL_AMBIENT, (0, 0, 0, 1))
-        glLight(GL_LIGHT0, GL_DIFFUSE, (1, 1, 1, 1))
-        glLight(GL_LIGHT0, GL_POSITION, (1, 1, 0+2, 0))
-        glLight(GL_LIGHT0, GL_SPECULAR, (1, 1, 1, 1))
-        glLightModelfv(GL_LIGHT_MODEL_AMBIENT, (0.2, 0.2, 0.2, 1))
-        glEnable(GL_LIGHTING); glEnable(GL_LIGHT0);
-        glEnable(GL_COLOR_MATERIAL)
-        glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE)
     # }}}
-    # {{{ initTexture(self, pathName): XXX
-    def initTexture(self, pathName):
+    # {{{ initShaders(self): XXX
+    def initShaders(self):
+        fs = shaders.compileShader("""
+            #version 330 core
+
+            in vec4 bgColour;
+            in vec2 fgTexCoord;
+            uniform sampler2D texture;
+
+            void main() {
+                vec4 texel = texture2D(texture, fgTexCoord);
+                if (texel.a > 0.0) {
+                    gl_FragColor = vec4(texel.r, texel.g, texel.b, 1.0);
+                } else {
+                    gl_FragColor = bgColour;
+                }
+            }
+            """, GL_FRAGMENT_SHADER)
+        vs = shaders.compileShader("""
+            #version 330 core
+
+            layout(location = 0) in vec4 vertex;
+            layout(location = 1) in vec3 normal;
+            layout(location = 2) in vec4 colour;
+            layout(location = 3) in vec2 texcoord;
+
+            out vec4 bgColour;
+            out vec2 fgTexCoord;
+
+            uniform mat4 model;
+            uniform mat4 projection;
+
+            void main() {
+                gl_Position = projection * model * vertex;
+                bgColour = colour;
+                fgTexCoord = texcoord;
+            }
+            """, GL_VERTEX_SHADER)
+        self.shader = shaders.compileProgram(vs, fs)
+    # }}}
+    # {{{ initTexture(self, pathName, infoPathName=os.path.join("assets", "textures.yaml")): XXX
+    def initTexture(self, pathName, infoPathName=os.path.join("assets", "textures.yaml")):
+        with open(infoPathName, "r") as fileObject:
+            artInfo = yaml.load(fileObject)
+
+        # [6], [7]
         artTextureId = glGenTextures(1)
-        artTextureImage = Image.open(pathName)
-        artTextureImageData = numpy.array(list(artTextureImage.getdata()), numpy.uint8)
+        artTextureImage = Image.open(pathName).transpose(Image.FLIP_TOP_BOTTOM)
+        artTextureImageData = numpy.array(artTextureImage)
 
         glBindTexture(GL_TEXTURE_2D, artTextureId)
         glPixelStorei(GL_UNPACK_ALIGNMENT, 1)
@@ -61,11 +102,11 @@ class ENNToolGLCanvasPanel(wx.glcanvas.GLCanvas, wx.Panel):
         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
 
         # [4][5]
-        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
                      artTextureImage.size[0], artTextureImage.size[1],
                      0, GL_RGBA, GL_UNSIGNED_BYTE, artTextureImageData)
         glBindTexture(GL_TEXTURE_2D, artTextureId)
-        return artTextureId
+        return artTextureId, artInfo
     # }}}
     # {{{ initVideoWriter(self): XXX
     def initVideoWriter(self, fourcc="XVID", fps=25):
@@ -76,54 +117,94 @@ class ENNToolGLCanvasPanel(wx.glcanvas.GLCanvas, wx.Panel):
     def renderFrame(self, artTextureId, artVbo, artVboLen):
         glEnableClientState(GL_VERTEX_ARRAY)
         glEnableClientState(GL_NORMAL_ARRAY)
+        glEnableClientState(GL_COLOR_ARRAY)
         glEnableClientState(GL_TEXTURE_COORD_ARRAY)
         glEnable(GL_TEXTURE_2D)
 
-        glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
+        glEnable(GL_BLEND)
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
 
         glBindTexture(GL_TEXTURE_2D, artTextureId)
         glBindBuffer(GL_ARRAY_BUFFER, artVbo)
-        glVertexPointer(3, GL_FLOAT, 32, ctypes.c_void_p(0))
-        glNormalPointer(GL_FLOAT, 32, ctypes.c_void_p(12))
-        glTexCoordPointer(2, GL_FLOAT, 32, ctypes.c_void_p(24))
+
+        glUseProgram(self.shader)
+        model = (GLfloat * 16)()
+        glGetFloatv(GL_MODELVIEW_MATRIX, model)
+        projection = (GLfloat * 16)()
+        glGetFloatv(GL_PROJECTION_MATRIX, projection)
+        glUniformMatrix4fv(glGetUniformLocation(self.shader, "model"), 1, GL_FALSE, model)
+        glUniformMatrix4fv(glGetUniformLocation(self.shader, "projection"), 1, GL_FALSE, projection)
+        glUniform1i(glGetUniformLocation(self.shader, "texture"), 0)
+
+        # [8]
+        glEnableVertexAttribArray(0)
+        glVertexAttribPointer(0, 3, GL_FLOAT, False, 48, ctypes.c_void_p(0))
+        glEnableVertexAttribArray(1)
+        glVertexAttribPointer(1, 3, GL_FLOAT, False, 48, ctypes.c_void_p(12))
+        glEnableVertexAttribArray(2)
+        glVertexAttribPointer(2, 4, GL_FLOAT, False, 48, ctypes.c_void_p(24))
+        glEnableVertexAttribArray(3)
+        glVertexAttribPointer(3, 2, GL_FLOAT, False, 48, ctypes.c_void_p(40))
+
+        glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
+        glVertexPointer(3, GL_FLOAT, 48, ctypes.c_void_p(0))
+        glNormalPointer(GL_FLOAT, 48, ctypes.c_void_p(12))
+        glColorPointer(4, GL_FLOAT, 48, ctypes.c_void_p(24))
+        glTexCoordPointer(2, GL_FLOAT, 48, ctypes.c_void_p(40))
         glDrawArrays(GL_QUADS, 0, artVboLen)
 
+        glDisableVertexAttribArray(0)
+        glDisable(GL_BLEND)
         glDisable(GL_TEXTURE_2D)
         glDisableClientState(GL_TEXTURE_COORD_ARRAY)
+        glDisableClientState(GL_COLOR_ARRAY)
         glDisableClientState(GL_NORMAL_ARRAY)
         glDisableClientState(GL_VERTEX_ARRAY)
     # }}}
-    # {{{ renderMiRCART(self, artMap, centre=True, canvasCols=100, cubeSize=(0.1, 0.2), texelHeight=0.0625, texelWidth=0.0625): XXX
-    def renderMiRCART(self, artMap, centre=True, canvasCols=100, cubeSize=(0.1, 0.2), texelHeight=0.0625, texelWidth=0.0625):
+    # {{{ renderMiRCART(self, artInfo, artMap, centre=True, canvasCols=100, cubeSize=(0.1, 0.2)): XXX
+    def renderMiRCART(self, artInfo, artMap, centre=True, canvasCols=100, cubeSize=(0.1, 0.2)):
         curPos = [0, 0, 0]; vertices = []; numVertices = 0;
         for numRow in range(len(artMap)):
             if centre and (len(artMap[numRow]) < canvasCols):
                 curPos[0] += (((canvasCols - len(artMap[numRow])) * cubeSize[0]) / 2)
             for numCol in range(len(artMap[numRow])):
-                cubeColour = artMap[numRow][numCol][1] * texelWidth
+                cubeColour = [*ENNToolMiRCARTColoursFloat[artMap[numRow][numCol][1]], 1.0]
+                if artMap[numRow][numCol][0] != artMap[numRow][numCol][1]:
+                    colColour = artMap[numRow][numCol][0]
+                    cubeChar = artMap[numRow][numCol][3]
+                    if ord(cubeChar) >= 128:
+                        print("dont have {}".format(cubeChar))
+                        cubeChar = " "
+                else:
+                    colColour = artMap[numRow][numCol][1]
+                    cubeChar = " "
 
                 # Top Right
                 vertices += curPos
                 vertices += [0.0, 0.0, 1.0]
-                vertices += [cubeColour+texelWidth, texelHeight]
+                vertices += cubeColour
+                vertices += [float(((ord(cubeChar) + 1) * artInfo["rowWidth"]) / artInfo["texWidth"]), ((colColour + 1) * artInfo["rowHeight"]) / float(artInfo["texHeight"])]
                 numVertices += 1
 
                 # Top Left
                 vertices += [curPos[0]-cubeSize[0], curPos[1], curPos[2]]
                 vertices += [0.0, 0.0, 1.0]
-                vertices += [cubeColour, texelHeight]
+                vertices += cubeColour
+                vertices += [float(((ord(cubeChar) + 0) * artInfo["rowWidth"]) / artInfo["texWidth"]), ((colColour + 1) * artInfo["rowHeight"]) / float(artInfo["texHeight"])]
                 numVertices += 1
 
                 # Bottom Left
                 vertices += [curPos[0]-cubeSize[0], curPos[1]-cubeSize[1], curPos[2]]
                 vertices += [0.0, 0.0, 1.0]
-                vertices += [cubeColour, 0.0]
+                vertices += cubeColour
+                vertices += [float(((ord(cubeChar) + 0) * artInfo["rowWidth"]) / artInfo["texWidth"]), ((colColour) * artInfo["rowHeight"]) / float(artInfo["texHeight"])]
                 numVertices += 1
 
                 # Bottom Right
                 vertices += [curPos[0], curPos[1]-cubeSize[1], curPos[2]]
                 vertices += [0.0, 0.0, 1.0]
-                vertices += [cubeColour+texelWidth, 0.0]
+                vertices += cubeColour
+                vertices += [float(((ord(cubeChar) + 1) * artInfo["rowWidth"]) / artInfo["texWidth"]), ((colColour) * artInfo["rowHeight"]) / float(artInfo["texHeight"])]
                 numVertices += 1
 
                 curPos[0] += cubeSize[0]

ENNToolTTFExporter.py

@@ -16,75 +16,61 @@ from ENNToolMiRCARTImporter import ENNToolMiRCARTImporter
 def main(*argv):
     fontNormalPathName = os.path.join("assets", "DejaVuSansMono.ttf")
     fontBoldPathName = os.path.join("assets", "DejaVuSansMono-Bold.ttf")
-    fontSize = int("11")
+    fontSize = int("26")
     outInfoFileName = os.path.join("assets", "textures.yaml")
-    outPathName = os.path.join("assets", "textures")
+    outFileName = os.path.join("assets", "DejaVuSansMono.png")
     if not os.path.exists(os.path.dirname(outInfoFileName)):
         os.makedirs(os.path.dirname(outInfoFileName))
-    if not os.path.exists(outPathName):
-        os.makedirs(outPathName)
+    if not os.path.exists(os.path.dirname(outFileName)):
+        os.makedirs(os.path.dirname(outFileName))
 
     pilFontNormal = ImageFont.truetype(fontNormalPathName, fontSize)
     pilFontBold = ImageFont.truetype(fontBoldPathName, fontSize)
     pilFontSize = list(pilFontNormal.getsize(" "))
     pilFontSize[0] += (8 - (pilFontSize[0] % 8))
     pilFontSize[1] = pilFontSize[0] * 2
-    pilImageSize = (pilFontSize[0] * 128, pilFontSize[1])
+    pilImageSize = (pilFontSize[0] * 128, (pilFontSize[1] * 16 * 4))
     print("font size: {}, image size: {}".format(pilFontSize, pilImageSize))
 
-    charMap = {}
-    for fontAttrs in [[ENNToolMiRCARTImporter._CellState.CS_NONE],
-                      [ENNToolMiRCARTImporter._CellState.CS_BOLD],
-                      [ENNToolMiRCARTImporter._CellState.CS_UNDERLINE],
-                      [ENNToolMiRCARTImporter._CellState.CS_BOLD, ENNToolMiRCARTImporter._CellState.CS_UNDERLINE]]:
-        for fontColour in range(16):
-            curPos = [0, 0]
-            pilImage = Image.new("RGBA", pilImageSize, (0, 0, 0, 0))
-            pilImageDraw = ImageDraw.Draw(pilImage)
+    curPos = [0, 0]
+    pilImage = Image.new("RGBA", pilImageSize, (0, 0, 0, 0))
+    pilImageDraw = ImageDraw.Draw(pilImage)
+
+    pilImageTmp = Image.new("RGBA", pilFontSize, (0, 0, 0, 0))
+    pilImageTmpDraw = ImageDraw.Draw(pilImageTmp)
+
+    for fontAttr in [ENNToolMiRCARTImporter._CellState.CS_BOLD | ENNToolMiRCARTImporter._CellState.CS_UNDERLINE,
+                     ENNToolMiRCARTImporter._CellState.CS_UNDERLINE,
+                     ENNToolMiRCARTImporter._CellState.CS_BOLD,
+                     ENNToolMiRCARTImporter._CellState.CS_NONE]:
+        for fontColour in reversed(range(16)):
             for fontChar in [chr(n) for n in range(128)]:
-                pilFont, underLine = None, False
-                for fontAttr in fontAttrs:
-                    if fontAttr == ENNToolMiRCARTImporter._CellState.CS_NONE:
-                        pilFont = pilFontNormal
-                    elif fontAttr == ENNToolMiRCARTImporter._CellState.CS_BOLD:
-                        pilFont = pilFontBold
-                    elif fontAttr == ENNToolMiRCARTImporter._CellState.CS_UNDERLINE:
-                        underLine = True
-                    else:
-                        raise ValueError
+                pilFont, underLine = pilFontNormal, False
+                if fontAttr & ENNToolMiRCARTImporter._CellState.CS_BOLD:
+                    pilFont = pilFontBold
+                if fontAttr & ENNToolMiRCARTImporter._CellState.CS_UNDERLINE:
+                    underLine = True
                 if fontChar in string.printable:
-                    pilImageDraw.text(curPos, fontChar,
+                    pilImageTmpDraw.text((0, 0), fontChar,
                                       (*ENNToolMiRCARTColours[fontColour], 255), pilFont)
+                    pilImage.paste(pilImageTmp, tuple(curPos))
+                    pilImageTmpDraw.rectangle((0, 0, pilFontSize[0], pilFontSize[1]),
+                                              fill=(0, 0, 0, 0))
                     if underLine:
                         pilImageDraw.line(
                             xy=(curPos[0], curPos[1] + (pilFontSize[1] - 2),
                                 curPos[0] + pilFontSize[0], curPos[1] + (pilFontSize[1] - 2)),
                             fill=(*ENNToolMiRCARTColours[fontColour], 255))
-                    if not fontChar in charMap:
-                        charMap[fontChar] = {}
-                    if not fontColour in charMap[fontChar]:
-                        charMap[fontChar][fontColour] = []
-                    charMap[fontChar][fontColour]   \
-                        += [{"attrs":fontAttrs,
-                             "bl":[float((curPos[0])/pilImageSize[0]), float((curPos[1])/pilImageSize[1])],
-                             "br":[float((curPos[0] + pilFontSize[0])/pilImageSize[0]), float((curPos[1])/pilImageSize[1])],
-                             "tl":[float((curPos[0])/pilImageSize[0]), float((curPos[1] + pilFontSize[1])/pilImageSize[1])],
-                             "tr":[float((curPos[0] + pilFontSize[0])/pilImageSize[0]), float((curPos[1] + pilFontSize[1])/pilImageSize[1])]}]
                 curPos[0] += pilFontSize[0]
-            fontAttrName = ""
-            for fontAttr in fontAttrs:
-                if fontAttr == ENNToolMiRCARTImporter._CellState.CS_NONE:
-                    fontAttrName += "Normal"
-                elif fontAttr == ENNToolMiRCARTImporter._CellState.CS_BOLD:
-                    fontAttrName += "Bold"
-                elif fontAttr == ENNToolMiRCARTImporter._CellState.CS_UNDERLINE:
-                    fontAttrName += "Underline"
-                else:
-                    raise ValueError
-            pilImage.save(os.path.join(outPathName, "{}Fg{:02d}.png".format(fontAttrName, fontColour)))
-
+            curPos[0], curPos[1] = 0, curPos[1] + pilFontSize[1]
+    pilImage.save(outFileName)
+    artInfo = {}
+    artInfo["rowHeight"] = pilFontSize[1]
+    artInfo["rowWidth"] = pilFontSize[0]
+    artInfo["texHeight"] = pilImageSize[1]
+    artInfo["texWidth"] = pilImageSize[0]
     with open(outInfoFileName, "w") as fileObject:
-        yaml.dump(charMap, fileObject)
+        yaml.dump(artInfo, fileObject)
 
 if __name__ == "__main__":
     main(*sys.argv)

assets/texture.png

@@ -0,0 +1 @@
+DejaVuSansMono.png