mirror of
https://github.com/rwengine/openrw.git
synced 2024-09-15 15:02:34 +02:00
Improve TextRenderer kerning and performance
This commit is contained in:
Daniel Evans
parent
a773262328
commit
3801e69e81
@ -3,6 +3,7 @@
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#include "OpenGLRenderer.hpp"
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#define GAME_FONTS 3
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#define GAME_GLYPHS 192
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class GameWorld;
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class GameRenderer;
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@ -44,6 +45,14 @@ public:
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TextInfo();
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};
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/**
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* Stores the information for kerning a glyph
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*/
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struct GlyphInfo
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{
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float widthFrac;
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};
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TextRenderer(GameWorld* engine, GameRenderer* renderer);
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~TextRenderer();
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@ -53,6 +62,8 @@ public:
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private:
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std::string fonts[GAME_FONTS];
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GlyphInfo glyphData[GAME_GLYPHS];
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GameWorld* engine;
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GameRenderer* renderer;
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Renderer::ShaderProgram* textShader;
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@ -1,83 +1,7 @@
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#include "render/TextRenderer.hpp"
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#include <render/GameRenderer.hpp>
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#include <engine/GameWorld.hpp>
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const char* TextVertexShader = R"(
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#version 130
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#extension GL_ARB_explicit_attrib_location : enable
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#extension GL_ARB_uniform_buffer_object : enable
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layout(location = 0) in vec2 position;
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layout(location = 3) in vec2 texcoord;
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layout(location = 2) in vec3 colour;
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out vec2 TexCoord;
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out vec3 Colour;
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uniform mat4 proj;
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void main()
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{
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gl_Position = proj * vec4(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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#version 130
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in vec2 TexCoord;
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in vec3 Colour;
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uniform vec4 colour;
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uniform sampler2D fontTexture;
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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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})";
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struct TextVertex
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{
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glm::vec2 position;
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glm::vec2 texcoord;
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glm::vec3 colour;
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static const AttributeList vertex_attributes() {
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return {
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{ATRS_Position, 2, sizeof(TextVertex), 0ul},
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{ATRS_TexCoord, 2, sizeof(TextVertex), 0ul + sizeof(glm::vec2)},
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{ATRS_Colour, 3, sizeof(TextVertex), 0ul + sizeof(glm::vec2) * 2},
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};
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}
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};
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TextRenderer::TextInfo::TextInfo()
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: font(0), size(1.f), baseColour({1.f, 1.f, 1.f}), align(Left)
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{
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}
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TextRenderer::TextRenderer(GameWorld* engine, GameRenderer* renderer)
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: fonts({}), engine(engine), renderer(renderer)
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{
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textShader = renderer->getRenderer()->createShader(
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TextVertexShader, TextFragmentShader );
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}
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TextRenderer::~TextRenderer()
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{
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}
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void TextRenderer::setFontTexture(int index, const std::string& texture)
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{
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if( index < GAME_FONTS )
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{
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fonts[index] = texture;
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}
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}
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#include <boost/concept_check.hpp>
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/// @todo This is very rough
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int charToIndex(char g)
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@ -124,6 +48,118 @@ glm::vec4 indexToCoord(int font, int index)
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glm::vec4( gsize, gsize ); // + glm::vec4( 0.0001f, 0.0001f,-0.0001f,-0.0001f);
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}
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const char* TextVertexShader = R"(
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#version 130
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#extension GL_ARB_explicit_attrib_location : enable
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#extension GL_ARB_uniform_buffer_object : enable
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layout(location = 0) in vec2 position;
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layout(location = 3) in vec2 texcoord;
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layout(location = 2) in vec3 colour;
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out vec2 TexCoord;
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out vec3 Colour;
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uniform mat4 proj;
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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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})";
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const char* TextFragmentShader = R"(
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#version 130
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in vec2 TexCoord;
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in vec3 Colour;
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uniform vec4 colour;
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uniform sampler2D fontTexture;
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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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})";
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struct TextVertex
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{
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glm::vec2 position;
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glm::vec2 texcoord;
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glm::vec3 colour;
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static const AttributeList vertex_attributes() {
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return {
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{ATRS_Position, 2, sizeof(TextVertex), 0ul},
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{ATRS_TexCoord, 2, sizeof(TextVertex), 0ul + sizeof(glm::vec2)},
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{ATRS_Colour, 3, sizeof(TextVertex), 0ul + sizeof(glm::vec2) * 2},
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};
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}
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};
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TextRenderer::TextInfo::TextInfo()
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: font(0), size(1.f), baseColour({1.f, 1.f, 1.f}), align(Left)
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{
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}
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TextRenderer::TextRenderer(GameWorld* engine, GameRenderer* renderer)
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: fonts({}), engine(engine), renderer(renderer)
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{
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textShader = renderer->getRenderer()->createShader(
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TextVertexShader, TextFragmentShader );
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for( int g = 0; g < GAME_GLYPHS; g++ )
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{
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glyphData[g] = { 1.f };
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}
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glyphData[charToIndex(' ')].widthFrac = 0.4f;
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glyphData[charToIndex('\'')].widthFrac = 0.5f;
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// Assumes contigious a-z character encoding
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for(char g = 0; g <= ('z'-'a'); g++)
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{
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switch( ('a' + g) )
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{
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case 'i':
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glyphData[charToIndex('a' + g)].widthFrac = 0.4f;
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glyphData[charToIndex('A' + g)].widthFrac = 0.4f;
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break;
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case 'l':
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glyphData[charToIndex('a' + g)].widthFrac = 0.5f;
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glyphData[charToIndex('A' + g)].widthFrac = 0.5f;
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break;
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case 'm':
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glyphData[charToIndex('a' + g)].widthFrac = 1.0f;
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glyphData[charToIndex('A' + g)].widthFrac = 1.0f;
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break;
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case 'w':
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glyphData[charToIndex('a' + g)].widthFrac = 1.0f;
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glyphData[charToIndex('A' + g)].widthFrac = 1.0f;
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break;
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default:
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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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break;
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}
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}
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}
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TextRenderer::~TextRenderer()
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{
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}
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void TextRenderer::setFontTexture(int index, const std::string& texture)
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{
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if( index < GAME_FONTS )
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{
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fonts[index] = texture;
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}
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}
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void TextRenderer::renderText(const TextRenderer::TextInfo& ti)
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{
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renderer->getRenderer()->useProgram(textShader);
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@ -132,33 +168,30 @@ void TextRenderer::renderText(const TextRenderer::TextInfo& ti)
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glActiveTexture(GL_TEXTURE0);
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renderer->getRenderer()->setUniform(textShader, "proj", renderer->getRenderer()->get2DProjection());
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renderer->getRenderer()->setUniformTexture(textShader, "fontTexture", 0);
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glm::vec2 coord( 0.f, 0.f );
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glm::vec2 alignment = ti.screenPosition;
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glm::vec2 coord = ti.screenPosition;
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Renderer::DrawParameters dp;
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dp.start = 0;
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dp.count = gb.getCount();
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auto ftexture = engine->gameData.findTexture(fonts[ti.font]);
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dp.texture = ftexture->getName();
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glm::vec2 ss( ti.size );
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/// @todo smarter alignment
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if ( ti.align == TextInfo::Right )
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{
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coord.x -= ss.x * ti.text.length();
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}
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else if ( ti.align == TextInfo::Center )
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{
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coord.x -= glm::floor(ss.x * ti.text.length() * 0.5f);
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}
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glm::vec3 colour = ti.baseColour;
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std::vector<TextVertex> geo;
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float maxWidth = 0.f;
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/// @todo make this less wastefull
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for( const char& c : ti.text )
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{
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int glyph = charToIndex(c);
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if( glyph >= GAME_GLYPHS )
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{
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continue;
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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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// Handle special chars.
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if( c == '\n' )
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{
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@ -167,23 +200,42 @@ void TextRenderer::renderText(const TextRenderer::TextInfo& ti)
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continue;
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}
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int glyph = charToIndex(c);
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auto tex = indexToCoord(ti.font, glyph);
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glm::vec2 p = coord;
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coord.x += ss.x;
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maxWidth = std::max(coord.x, maxWidth);
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std::vector<TextVertex> geo = {
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{ { p.x, p.y + ss.y }, {tex.x, tex.w}, colour },
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{ { p.x + ss.x, p.y + ss.y }, {tex.z, tex.w}, colour },
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{ { p.x, p.y }, {tex.x, tex.y}, colour },
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{ { p.x + ss.x, p.y }, {tex.z, tex.y}, colour },
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};
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geo.push_back({ { p.x, p.y + ss.y }, {tex.x, tex.w}, colour });
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geo.push_back({ { p.x + ss.x, p.y + ss.y }, {tex.z, tex.w}, colour });
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geo.push_back({ { p.x, p.y }, {tex.x, tex.y}, colour });
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gb.uploadVertices(geo);
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db.addGeometry(&gb);
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db.setFaceType(GL_TRIANGLE_STRIP);
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renderer->getRenderer()->drawArrays(glm::mat4(), &db, dp);
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geo.push_back({ { p.x + ss.x, p.y }, {tex.z, tex.y}, colour });
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geo.push_back({ { p.x, p.y }, {tex.x, tex.y}, colour });
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geo.push_back({ { p.x + ss.x, p.y + ss.y }, {tex.z, tex.w}, colour });
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}
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if ( ti.align == TextInfo::Right )
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{
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alignment.x -= maxWidth;
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}
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else if ( ti.align == TextInfo::Center )
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{
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alignment.x -= (maxWidth / 2.f);
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}
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renderer->getRenderer()->setUniform(textShader, "proj", renderer->getRenderer()->get2DProjection());
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renderer->getRenderer()->setUniformTexture(textShader, "fontTexture", 0);
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renderer->getRenderer()->setUniform(textShader, "alignment", alignment);
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gb.uploadVertices(geo);
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db.addGeometry(&gb);
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db.setFaceType(GL_TRIANGLES);
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Renderer::DrawParameters dp;
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dp.start = 0;
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dp.count = gb.getCount();
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auto ftexture = engine->gameData.findTexture(fonts[ti.font]);
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dp.texture = ftexture->getName();
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renderer->getRenderer()->drawArrays(glm::mat4(), &db, dp);
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}
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@ -52,44 +52,44 @@ void drawOnScreenText(GameWorld* world)
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switch(t.osTextStyle)
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{
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default:
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ti.size = 15.f;
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ti.font = 0;
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ti.align = TextRenderer::TextInfo::Left;
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ti.baseColour = glm::vec3(1.f);
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ti.screenPosition = vp / 2;
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break;
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case OnscreenText::HighPriority:
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ti.size = 20.f;
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ti.font = 2;
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ti.baseColour = glm::vec3(1.f);
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ti.screenPosition = glm::vec2(vp.x * 0.5f, vp.y - ti.size * 2.f);
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ti.align = TextRenderer::TextInfo::Center;
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break;
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case OnscreenText::CenterBig:
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ti.size = 30.f;
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ti.font = 1;
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ti.baseColour = glm::vec3(82, 114, 128) / 255.f;
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ti.align = TextRenderer::TextInfo::Center;
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ti.screenPosition = vp / 2;
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ti.screenPosition += glm::vec2(0.f, ti.size / 2.f);
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shadowOffset = glm::vec2(2.f, 0.f);
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break;
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case OnscreenText::MissionName:
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ti.size = 30.f;
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ti.font = 1;
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ti.baseColour = glm::vec3(205, 162, 7)/255.f;
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ti.screenPosition = glm::vec2(vp.x - 10.f, vp.y * 0.79f);
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ti.align = TextRenderer::TextInfo::Right;
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shadowOffset = glm::vec2(2.f, 2.f);
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break;
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case OnscreenText::Help:
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ti.screenPosition = glm::vec2(20.f, 20.f);
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ti.font = 2;
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ti.size = 20.f;
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ti.baseColour = glm::vec3(1.f);
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ti.align = TextRenderer::TextInfo::Left;
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break;
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default:
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ti.size = 15.f;
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ti.font = 0;
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ti.align = TextRenderer::TextInfo::Left;
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ti.baseColour = glm::vec3(1.f);
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ti.screenPosition = vp / 2;
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break;
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case OnscreenText::HighPriority:
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ti.size = 16.f;
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ti.font = 2;
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ti.baseColour = glm::vec3(1.f);
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ti.screenPosition = glm::vec2(vp.x * 0.5f, vp.y * 0.9f);
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ti.align = TextRenderer::TextInfo::Center;
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break;
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case OnscreenText::CenterBig:
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ti.size = 30.f;
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ti.font = 1;
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ti.baseColour = glm::vec3(82, 114, 128) / 255.f;
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ti.align = TextRenderer::TextInfo::Center;
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ti.screenPosition = vp / 2;
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ti.screenPosition += glm::vec2(0.f, ti.size / 2.f);
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shadowOffset = glm::vec2(2.f, 0.f);
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break;
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case OnscreenText::MissionName:
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ti.size = 30.f;
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ti.font = 1;
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ti.baseColour = glm::vec3(205, 162, 7)/255.f;
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ti.screenPosition = glm::vec2(vp.x - 10.f, vp.y * 0.79f);
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ti.align = TextRenderer::TextInfo::Right;
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shadowOffset = glm::vec2(2.f, 2.f);
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break;
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case OnscreenText::Help:
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ti.screenPosition = glm::vec2(20.f, 20.f);
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ti.font = 2;
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ti.size = 20.f;
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ti.baseColour = glm::vec3(1.f);
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ti.align = TextRenderer::TextInfo::Left;
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break;
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}
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ti.text = t.osTextString;
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