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rwengine: add font-dependent kerning
This commit is contained in:
Anonymous Maarten
parent
f95427c136
commit
38fca841e7
@ -12,18 +12,24 @@
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#include "engine/GameData.hpp"
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#include "render/GameRenderer.hpp"
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int charToIndex(uint16_t g) {
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namespace {
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unsigned charToIndex(std::uint16_t g) {
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// Correct for the default font maps
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/// @todo confirm for JA / RU font maps
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return g - 32;
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}
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glm::vec4 indexToCoord(font_t font, int index) {
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float x = static_cast<int>(index % 16);
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float y = static_cast<int>(index / 16) + 0.01f;
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float fontHeight = ((font == FONT_PAGER) ? 16.f : 13.f);
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glm::vec2 gsize(1.f / 16.f, 1.f / fontHeight);
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return glm::vec4(x, y, x + 1, y + 0.98f) * glm::vec4(gsize, gsize);
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glm::vec4 indexToTexCoord(int index, const glm::u32vec2 &textureSize, const glm::u8vec2 &glyphOffset) {
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constexpr unsigned TEXTURE_COLUMNS = 16;
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const float x = index % TEXTURE_COLUMNS;
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const float y = index / TEXTURE_COLUMNS;
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// Add offset to avoid 'leakage' between adjacent glyphs
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float s = (x * glyphOffset.x + 0.5f) / textureSize.x;
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float t = (y * glyphOffset.y + 0.5f) / textureSize.y;
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float p = ((x + 1) * glyphOffset.x - 1.5f) / textureSize.x;
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float q = ((y + 1) * glyphOffset.y - 1.5f) / textureSize.y;
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return glm::vec4(s, t, p, q);
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}
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const char* TextVertexShader = R"(
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@ -40,9 +46,9 @@ uniform vec2 alignment;
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void main()
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{
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gl_Position = proj * vec4(alignment + position, 0.0, 1.0);
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TexCoord = texcoord;
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Colour = colour;
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gl_Position = proj * vec4(alignment + position, 0.0, 1.0);
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TexCoord = texcoord;
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Colour = colour;
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})";
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const char* TextFragmentShader = R"(
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@ -56,10 +62,64 @@ out vec4 outColour;
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void main()
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{
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float a = texture(fontTexture, TexCoord).a;
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outColour = vec4(Colour, a);
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float a = texture(fontTexture, TexCoord).a;
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outColour = vec4(Colour, a);
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})";
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constexpr size_t GLYPHS_NB = 193;
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using FontWidthLut = std::array<std::uint8_t, GLYPHS_NB>;
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constexpr std::array<std::uint8_t, 193> fontWidthsPager = {
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3, 3, 6, 8, 6, 10, 8, 3, 5, 5, 7, 0, 3, 7, 3, 0, // 1
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6, 4, 6, 6, 7, 6, 6, 6, 6, 6, 3, 0, 0, 0, 0, 6, // 2
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0, 6, 6, 6, 6, 6, 6, 6, 6, 3, 6, 6, 5, 8, 7, 6, // 3
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6, 7, 6, 6, 5, 6, 6, 8, 6, 7, 7, 0, 0, 0, 0, 0, // 4
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0, 6, 6, 6, 6, 6, 5, 6, 6, 3, 4, 6, 3, 9, 6, 6, // 5
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6, 6, 5, 6, 5, 6, 6, 8, 6, 6, 5, 0, 0, 0, 0, 0, // 6
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6, 6, 6, 6, 8, 6, 6, 6, 6, 6, 5, 5, 6, 6, 6, 6, // 7
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6, 6, 6, 6, 6, 6, 7, 6, 6, 6, 6, 9, 6, 6, 6, 6, // 8
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 6, 6, // 9
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3, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 10
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 11
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // 12
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8,
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};
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constexpr std::array<std::uint8_t, 193> fontWidthsPriceDown = {
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11, 13, 30, 27, 20, 24, 22, 12, 14, 14, 0, 26, 9, 14, 9, 26, // 1
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20, 19, 20, 20, 22, 20, 20, 19, 20, 20, 13, 29, 24, 29, 24, 20, // 2
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27, 20, 20, 20, 20, 20, 17, 20, 20, 10, 20, 20, 15, 30, 20, 20, // 3
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20, 20, 20, 20, 22, 20, 22, 32, 20, 20, 19, 27, 20, 32, 23, 13, // 4
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27, 21, 21, 21, 21, 21, 18, 22, 21, 12, 20, 22, 17, 30, 22, 21, // 5
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21, 21, 21, 22, 21, 21, 21, 29, 19, 23, 21, 28, 25, 0, 0, 0, // 6
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20, 20, 20, 20, 30, 20, 20, 20, 20, 20, 10, 10, 10, 10, 21, 21, // 7
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21, 21, 20, 20, 20, 20, 21, 21, 21, 21, 21, 32, 23, 21, 21, 21, // 8
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21, 12, 12, 12, 12, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, // 9
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13, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, // 10
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19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, // 11
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19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, // 12
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16,
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};
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constexpr std::array<std::uint8_t, 193> fontWidthsArial = {
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27, 25, 55, 43, 47, 65, 53, 19, 29, 31, 21, 45, 23, 35, 27, 29, // 1
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47, 33, 45, 43, 49, 47, 47, 41, 47, 45, 25, 23, 53, 43, 53, 39, // 2
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61, 53, 51, 47, 49, 45, 43, 49, 53, 23, 41, 53, 45, 59, 53, 51, // 3
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47, 51, 49, 49, 45, 51, 49, 59, 59, 47, 51, 31, 27, 31, 29, 27, // 4
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19, 43, 45, 43, 43, 45, 27, 45, 43, 21, 33, 45, 23, 65, 43, 43, // 5
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47, 45, 33, 41, 29, 43, 41, 61, 51, 43, 43, 67, 53, 67, 67, 71, // 6
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53, 53, 53, 53, 65, 49, 45, 45, 45, 45, 23, 23, 23, 23, 51, 51, // 7
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51, 51, 51, 51, 51, 51, 51, 43, 43, 43, 43, 65, 43, 45, 45, 45, // 8
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45, 21, 21, 21, 21, 43, 43, 43, 43, 43, 43, 43, 43, 53, 43, 39, // 9
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25, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, // 10
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19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 19, 19, // 11
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19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, // 12
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19,
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};
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}
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struct TextVertex {
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glm::vec2 position;
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glm::vec2 texcoord;
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@ -85,46 +145,43 @@ struct TextVertex {
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TextRenderer::TextRenderer(GameRenderer* renderer) : renderer(renderer) {
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textShader = renderer->getRenderer()->createShader(TextVertexShader,
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TextFragmentShader);
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std::fill(glyphData.begin(), glyphData.end(), GlyphInfo{.9f});
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glyphData[charToIndex(' ')].widthFrac = 0.4f;
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glyphData[charToIndex('-')].widthFrac = 0.5f;
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glyphData[charToIndex('\'')].widthFrac = 0.5f;
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glyphData[charToIndex('(')].widthFrac = 0.45f;
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glyphData[charToIndex(')')].widthFrac = 0.45f;
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glyphData[charToIndex(':')].widthFrac = 0.65f;
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glyphData[charToIndex('$')].widthFrac = 0.65f;
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for (char g = '0'; g <= '9'; ++g) {
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glyphData[charToIndex(g)].widthFrac = 0.65f;
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}
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// Assumes contiguous a-z character encoding
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for (char g = 0; g <= ('z' - 'a'); g++) {
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glyphData[charToIndex('a' + g)].widthFrac = 0.7f;
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glyphData[charToIndex('A' + g)].widthFrac = 0.7f;
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}
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// case 'i':
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glyphData[charToIndex('i')].widthFrac = 0.4f;
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glyphData[charToIndex('I')].widthFrac = 0.4f;
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// case 'l':
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glyphData[charToIndex('l')].widthFrac = 0.5f;
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glyphData[charToIndex('L')].widthFrac = 0.5f;
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// case 'm':
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glyphData[charToIndex('m')].widthFrac = 1.0f;
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glyphData[charToIndex('M')].widthFrac = 1.0f;
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// case 'w':
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glyphData[charToIndex('w')].widthFrac = 1.0f;
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glyphData[charToIndex('W')].widthFrac = 1.0f;
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// case 'accent aigu'
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glyphData[0x91].widthFrac = 0.6f;
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}
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void TextRenderer::setFontTexture(int index, const std::string& texture) {
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if (index < GAME_FONTS) {
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fonts[index] = texture;
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void TextRenderer::setFontTexture(font_t font, const std::string& textureName) {
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if (font >= FONTS_COUNT) {
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RW_ERROR("Illegal font: " << font);
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return;
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}
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auto ftexture = renderer->getData()->findSlotTexture("fonts", textureName);
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const glm::u32vec2 textureSize = ftexture->getSize();
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glm::u8vec2 glyphOffset{textureSize.x / 16, textureSize.x / 16};
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if (font != FONT_PAGER) {
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glyphOffset.y += glyphOffset.y / 4;
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}
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const FontWidthLut *glyphWidths;
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switch (font) {
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case FONT_PAGER:
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glyphWidths = &fontWidthsPager;
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break;
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case FONT_PRICEDOWN:
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glyphWidths = &fontWidthsPriceDown;
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break;
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case FONT_ARIAL:
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glyphWidths = &fontWidthsArial;
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break;
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}
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std::uint8_t monoWidth = 0;
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if (font == FONT_PAGER) {
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monoWidth = 1 + *std::max_element(fontWidthsPager.cbegin(),
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fontWidthsPager.cend());
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}
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fonts[font] = FontMetaData{
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textureName,
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*glyphWidths,
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textureSize,
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glyphOffset,
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monoWidth
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};
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}
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void TextRenderer::renderText(const TextRenderer::TextInfo& ti,
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@ -151,6 +208,8 @@ void TextRenderer::renderText(const TextRenderer::TextInfo& ti,
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auto text = ti.text;
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const auto &fontMetaData = fonts[ti.font];
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for (size_t i = 0; i < text.length(); ++i) {
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char16_t c = text[i];
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@ -209,8 +268,8 @@ void TextRenderer::renderText(const TextRenderer::TextInfo& ti,
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colour = glm::vec3(ti.baseColour) * (1 / 255.f);
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}
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int glyph = charToIndex(c);
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if (glyph >= GAME_GLYPHS) {
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auto glyph = charToIndex(c);
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if (glyph >= fontMetaData.glyphWidths.size()) {
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continue;
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}
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@ -230,11 +289,8 @@ void TextRenderer::renderText(const TextRenderer::TextInfo& ti,
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}
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}
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auto& data = glyphData[glyph];
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auto tex = indexToCoord(ti.font, glyph);
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ss.x = ti.size * data.widthFrac;
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tex.z = tex.x + (tex.z - tex.x) * data.widthFrac;
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auto tex = indexToTexCoord(glyph, fontMetaData.textureSize, fontMetaData.glyphOffset);
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ss.x = ti.size * static_cast<float>(fontMetaData.glyphOffset.x) / fontMetaData.glyphOffset.y;
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// Handle special chars.
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if (c == '\n') {
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@ -247,7 +303,15 @@ void TextRenderer::renderText(const TextRenderer::TextInfo& ti,
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lineLength++;
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glm::vec2 p = coord;
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coord.x += ss.x;
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float factor = ti.size / static_cast<float>(fontMetaData.glyphOffset.y);
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float glyphWidth = factor * static_cast<float>(fontMetaData.glyphWidths[glyph]);
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if (fontMetaData.monoWidth != 0) {
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float monoWidth = factor * fontMetaData.monoWidth;
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p.x += static_cast<float>(monoWidth - glyphWidth) / 2;
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coord.x += monoWidth;
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} else {
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coord.x += glyphWidth;
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}
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maxWidth = std::max(coord.x, maxWidth);
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geo.emplace_back(glm::vec2{p.x, p.y + ss.y}, glm::vec2{tex.x, tex.w}, colour);
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@ -287,7 +351,7 @@ void TextRenderer::renderText(const TextRenderer::TextInfo& ti,
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dp.start = 0;
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dp.blendMode = BlendMode::BLEND_ALPHA;
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dp.count = gb.getCount();
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auto ftexture = renderer->getData()->findSlotTexture("fonts", fonts[ti.font]);
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auto ftexture = renderer->getData()->findSlotTexture("fonts", fontMetaData.textureName);
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dp.textures = {ftexture->getName()};
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dp.depthWrite = false;
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@ -14,9 +14,6 @@
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#include <fonts/GameTexts.hpp>
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#include <render/OpenGLRenderer.hpp>
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#define GAME_FONTS 3
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#define GAME_GLYPHS 192
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class GameRenderer;
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/**
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* @brief Handles rendering of bitmap font textures.
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@ -62,13 +59,35 @@ public:
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TextRenderer(GameRenderer* renderer);
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~TextRenderer() = default;
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void setFontTexture(int index, const std::string& font);
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void setFontTexture(font_t font, const std::string& textureName);
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void renderText(const TextInfo& ti, bool forceColour = false);
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private:
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std::string fonts[GAME_FONTS];
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std::array<GlyphInfo, GAME_GLYPHS> glyphData;
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class FontMetaData {
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public:
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FontMetaData() = default;
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template<size_t N>
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FontMetaData(const std::string &textureName,
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const std::array<std::uint8_t, N> &glyphWidths,
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const glm::u32vec2 &textureSize,
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const glm::u8vec2 &glyphOffset,
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const std::uint8_t monoWidth)
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: textureName(textureName)
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, glyphWidths(glyphWidths.cbegin(), glyphWidths.cend())
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, textureSize(textureSize)
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, glyphOffset(glyphOffset)
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, monoWidth(monoWidth)
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{
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}
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std::string textureName;
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std::vector<std::uint8_t> glyphWidths;
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glm::u32vec2 textureSize;
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glm::u8vec2 glyphOffset;
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std::uint8_t monoWidth;
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};
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std::array<FontMetaData, FONTS_COUNT> fonts;
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GameRenderer* renderer;
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std::unique_ptr<Renderer::ShaderProgram> textShader;
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