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rwengine: add font-dependent kerning

This commit is contained in:
Anonymous Maarten 2018-08-01 15:15:26 +02:00
parent f95427c136
commit 38fca841e7
2 changed files with 147 additions and 64 deletions

View File

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

View File

@ -14,9 +14,6 @@
#include <fonts/GameTexts.hpp>
#include <render/OpenGLRenderer.hpp>
#define GAME_FONTS 3
#define GAME_GLYPHS 192
class GameRenderer;
/**
* @brief Handles rendering of bitmap font textures.
@ -62,13 +59,35 @@ public:
TextRenderer(GameRenderer* renderer);
~TextRenderer() = default;
void setFontTexture(int index, const std::string& font);
void setFontTexture(font_t font, const std::string& textureName);
void renderText(const TextInfo& ti, bool forceColour = false);
private:
std::string fonts[GAME_FONTS];
std::array<GlyphInfo, GAME_GLYPHS> glyphData;
class FontMetaData {
public:
FontMetaData() = default;
template<size_t N>
FontMetaData(const std::string &textureName,
const std::array<std::uint8_t, N> &glyphWidths,
const glm::u32vec2 &textureSize,
const glm::u8vec2 &glyphOffset,
const std::uint8_t monoWidth)
: textureName(textureName)
, glyphWidths(glyphWidths.cbegin(), glyphWidths.cend())
, textureSize(textureSize)
, glyphOffset(glyphOffset)
, monoWidth(monoWidth)
{
}
std::string textureName;
std::vector<std::uint8_t> glyphWidths;
glm::u32vec2 textureSize;
glm::u8vec2 glyphOffset;
std::uint8_t monoWidth;
};
std::array<FontMetaData, FONTS_COUNT> fonts;
GameRenderer* renderer;
std::unique_ptr<Renderer::ShaderProgram> textShader;