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Made fonts be rendered by opengl.

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This commit is contained in:
Joel Teichroeb 2011-05-22 20:43:28 -07:00
parent 1530048c74
commit 5fb97a647b
7 changed files with 165 additions and 14 deletions
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125
engines/grim/gfx_opengl.cpp
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@ -769,6 +769,131 @@ void GfxOpenGL::destroyBitmap(BitmapData *bitmap) {
}
}
void GfxOpenGL::createFont(Font *font) {
byte *bitmapData = font->_fontData;
byte *texDataPtr = new byte[font->_dataSize *4];
byte *data = texDataPtr;
for (uint32 i = 0; i < font->_dataSize; i++, texDataPtr += 4, bitmapData++) {
byte pixel = *bitmapData;
if (pixel == 0x00) {
texDataPtr[0] = 0;
texDataPtr[1] = 0;
texDataPtr[2] = 0;
texDataPtr[3] = 0;
} else if (pixel == 0x80) {
texDataPtr[0] = 0;
texDataPtr[1] = 0;
texDataPtr[2] = 0;
texDataPtr[3] = 255;
} else if (pixel == 0xFF) {
texDataPtr[0] = 255;
texDataPtr[1] = 255;
texDataPtr[2] = 255;
texDataPtr[3] = 255;
}
}
byte *temp = new byte[64*64*4];
font->_texIds = new GLuint[256];
font->_sizes = new uint8[256];
GLuint *textures = (GLuint *)font->_texIds;
glGenTextures(256, textures);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
for (int i = 0; i < 256; ++i) {
//
uint8 size = 64;
int width = font->getCharDataWidth(i), height = font->getCharDataHeight(i);
int m = max(width, height);
if (m < 8)
size = 8;
if (m < 16)
size = 16;
else if (m < 32)
size = 32;
else if (m > 64)
error("too big");
int d = ((int)font->getCharData(i) - (int)font->getCharData(0));
// need to remove this
memset(temp, 0, 64*64*4);
for (int x = 0; x < height; ++x) {
int pos = x * size * 4;
memcpy(temp + pos, data + d * 4 + x * width * 4, width * 4);
}
glPixelStorei(GL_UNPACK_ROW_LENGTH, size);
glBindTexture(GL_TEXTURE_2D, textures[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size, size, 0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, temp);
((uint8 *)font->_sizes)[i] = size;
}
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
delete[] data;
}
void GfxOpenGL::drawText(int x, int y, const Common::String &text, Font *font, Color &color) {
if (text.size() == 0)
return;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, _screenWidth, _screenHeight, 0, 0, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
// A lot more may need to be put there : disabling Alpha test, blending, ...
// For now, just keep this here :-)
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_LIGHTING);
glEnable(GL_TEXTURE_2D);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glColor3f(color.getRed()/255.f, color.getGreen()/255.f, color.getBlue()/255.f);
for (uint i = 0; i < text.size(); ++i) {
int w = y + font->getCharStartingLine(text[i]) + font->getBaseOffsetY();
uint8 size = ((uint8 *)font->_sizes)[text[i]];
GLuint *textures = (GLuint *)font->_texIds;
glBindTexture(GL_TEXTURE_2D, textures[text[i]]);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f);
glVertex2i(x, w);
glTexCoord2f(1.0f, 0.0f);
glVertex2i(x + size, w);
glTexCoord2f(1.0f, 1.0f);
glVertex2i(x + size, w + size);
glTexCoord2f(0.0f, 1.0f);
glVertex2i(x, w + size);
glEnd();
x += font->getCharWidth(text[i]);
}
glColor3f(1, 1, 1);
glDisable(GL_SCISSOR_TEST);
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
glDepthMask(GL_TRUE);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
}
void GfxOpenGL::createMaterial(Material *material, const char *data, const CMap *cmap) {
material->_textures = new GLuint[material->_numImages];
glGenTextures(material->_numImages, (GLuint *)material->_textures);