diff --git a/src/Backends/Rendering.h b/src/Backends/Rendering.h index ece37db2..fb1689bd 100644 --- a/src/Backends/Rendering.h +++ b/src/Backends/Rendering.h @@ -28,7 +28,7 @@ void Backend_ColourFill(Backend_Surface *surface, const RECT *rect, unsigned cha void Backend_ColourFillToScreen(const RECT *rect, unsigned char red, unsigned char green, unsigned char blue); void Backend_ScreenToSurface(Backend_Surface *surface, const RECT *rect); BOOL Backend_SupportsSubpixelGlyph(void); -Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned short total_greys, unsigned char pixel_mode); +Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned char pixel_mode); void Backend_UnloadGlyph(Backend_Glyph *glyph); void Backend_DrawGlyph(Backend_Surface *surface, Backend_Glyph *glyph, long x, long y, const unsigned char *colours); void Backend_DrawGlyphToScreen(Backend_Glyph *glyph, long x, long y, const unsigned char *colours); diff --git a/src/Backends/Rendering/OpenGL3.cpp b/src/Backends/Rendering/OpenGL3.cpp index f1f180d8..b048bb40 100644 --- a/src/Backends/Rendering/OpenGL3.cpp +++ b/src/Backends/Rendering/OpenGL3.cpp @@ -3,6 +3,7 @@ #include #include #include +#include #include #include "SDL.h" @@ -24,7 +25,7 @@ typedef struct Backend_Glyph GLuint texture_id; unsigned int width; unsigned int height; - BOOL subpixel_mode; + unsigned char pixel_mode; } Backend_Glyph; typedef struct Coordinate2D @@ -204,36 +205,6 @@ static GLuint CompileShader(const char *vertex_shader_source, const char *fragme return program_id; } -static unsigned char GammaCorrect(unsigned char value) -{ - /* - Generated with... - for (unsigned int i = 0; i < 0x100; ++i) - lookup[i] = pow(i / 255.0, 1.0 / 1.8) * 255.0; - */ - - const unsigned char lookup[0x100] = { - 0x00, 0x0B, 0x11, 0x15, 0x19, 0x1C, 0x1F, 0x22, 0x25, 0x27, 0x2A, 0x2C, 0x2E, 0x30, 0x32, 0x34, - 0x36, 0x38, 0x3A, 0x3C, 0x3D, 0x3F, 0x41, 0x43, 0x44, 0x46, 0x47, 0x49, 0x4A, 0x4C, 0x4D, 0x4F, - 0x50, 0x51, 0x53, 0x54, 0x55, 0x57, 0x58, 0x59, 0x5B, 0x5C, 0x5D, 0x5E, 0x60, 0x61, 0x62, 0x63, - 0x64, 0x65, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, - 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x84, - 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, - 0x94, 0x95, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0x9F, 0xA0, - 0xA1, 0xA2, 0xA3, 0xA3, 0xA4, 0xA5, 0xA6, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAA, 0xAB, 0xAC, 0xAD, - 0xAD, 0xAE, 0xAF, 0xB0, 0xB0, 0xB1, 0xB2, 0xB3, 0xB3, 0xB4, 0xB5, 0xB6, 0xB6, 0xB7, 0xB8, 0xB8, - 0xB9, 0xBA, 0xBB, 0xBB, 0xBC, 0xBD, 0xBD, 0xBE, 0xBF, 0xBF, 0xC0, 0xC1, 0xC2, 0xC2, 0xC3, 0xC4, - 0xC4, 0xC5, 0xC6, 0xC6, 0xC7, 0xC8, 0xC8, 0xC9, 0xCA, 0xCA, 0xCB, 0xCC, 0xCC, 0xCD, 0xCE, 0xCE, - 0xCF, 0xD0, 0xD0, 0xD1, 0xD2, 0xD2, 0xD3, 0xD4, 0xD4, 0xD5, 0xD6, 0xD6, 0xD7, 0xD7, 0xD8, 0xD9, - 0xD9, 0xDA, 0xDB, 0xDB, 0xDC, 0xDC, 0xDD, 0xDE, 0xDE, 0xDF, 0xE0, 0xE0, 0xE1, 0xE1, 0xE2, 0xE3, - 0xE3, 0xE4, 0xE4, 0xE5, 0xE6, 0xE6, 0xE7, 0xE7, 0xE8, 0xE9, 0xE9, 0xEA, 0xEA, 0xEB, 0xEC, 0xEC, - 0xED, 0xED, 0xEE, 0xEF, 0xEF, 0xF0, 0xF0, 0xF1, 0xF1, 0xF2, 0xF3, 0xF3, 0xF4, 0xF4, 0xF5, 0xF5, - 0xF6, 0xF7, 0xF7, 0xF8, 0xF8, 0xF9, 0xF9, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC, 0xFD, 0xFD, 0xFE, 0xFF - } - - return lookup[value]; -} - SDL_Window* Backend_CreateWindow(const char *title, int width, int height) { SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE); @@ -553,54 +524,26 @@ BOOL Backend_SupportsSubpixelGlyph(void) return TRUE; } -Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned short total_greys, unsigned char pixel_mode) +Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned char pixel_mode) { Backend_Glyph *glyph = (Backend_Glyph*)malloc(sizeof(Backend_Glyph)); if (glyph == NULL) return NULL; - const BOOL subpixel_mode = pixel_mode == FONT_PIXEL_MODE_LCD; - - const int destination_pitch = ((subpixel_mode ? width * 3 : width) + 3) & ~3; // Round up to the nearest 4 (OpenGL needs this) + const unsigned int destination_pitch = (width + 3) & ~3; // Round up to the nearest 4 (OpenGL needs this) unsigned char *buffer = (unsigned char*)malloc(destination_pitch * height); - if (buffer == NULL) - { - free(glyph); - return NULL; - } - switch (pixel_mode) { case FONT_PIXEL_MODE_LCD: - for (unsigned int y = 0; y < height; ++y) - { - const unsigned char *source_pointer = pixels + y * pitch; - unsigned char *destination_pointer = buffer + y * destination_pitch; - - for (unsigned int x = 0; x < width; ++x) - { - for (unsigned int i = 0; i < 3; ++i) - { - *destination_pointer++ = GammaCorrect(*source_pointer++); - } - } - } - - break; - case FONT_PIXEL_MODE_GRAY: for (unsigned int y = 0; y < height; ++y) { const unsigned char *source_pointer = pixels + y * pitch; unsigned char *destination_pointer = buffer + y * destination_pitch; - - for (unsigned int x = 0; x < width; ++x) - { - *destination_pointer++ = GammaCorrect((*source_pointer++ * 0xFF) / (total_greys - 1)); - } + memcpy(destination_pointer, source_pointer, width); } break; @@ -612,9 +555,7 @@ Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width unsigned char *destination_pointer = buffer + y * destination_pitch; for (unsigned int x = 0; x < width; ++x) - { - *destination_pointer++ = *source_pointer++ ? 0xFF : 0; - } + *destination_pointer++ = (*source_pointer++ ? 0xFF : 0); } break; @@ -622,16 +563,19 @@ Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width glGenTextures(1, &glyph->texture_id); glBindTexture(GL_TEXTURE_2D, glyph->texture_id); - glTexImage2D(GL_TEXTURE_2D, 0, subpixel_mode ? GL_RGB8 : GL_R8, width, height, 0, subpixel_mode ? GL_RGB : GL_RED, GL_UNSIGNED_BYTE, buffer); + if (pixel_mode == FONT_PIXEL_MODE_LCD) + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, width / 3, height, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer); + else + glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, buffer); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); - glyph->width = width; + glyph->width = (pixel_mode == FONT_PIXEL_MODE_LCD ? width / 3 : width); glyph->height = height; - glyph->subpixel_mode = subpixel_mode; + glyph->pixel_mode = pixel_mode; free(buffer); @@ -688,7 +632,7 @@ static void DrawGlyphCommon(Backend_Surface *surface, Backend_Glyph *glyph, long glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertex_buffer), &vertex_buffer); - if (glyph->subpixel_mode) + if (glyph->pixel_mode == FONT_PIXEL_MODE_LCD) { // Here we're going to draw with per-component alpha. // Since OpenGL doesn't really support this, we have to do it manually: diff --git a/src/Backends/Rendering/SDLSurface.cpp b/src/Backends/Rendering/SDLSurface.cpp index 3b7d4237..4eb918df 100644 --- a/src/Backends/Rendering/SDLSurface.cpp +++ b/src/Backends/Rendering/SDLSurface.cpp @@ -38,36 +38,6 @@ static void RectToSDLRect(const RECT *rect, SDL_Rect *sdl_rect) sdl_rect->h = 0; } -static unsigned char GammaCorrect(unsigned char value) -{ - /* - Generated with... - for (unsigned int i = 0; i < 0x100; ++i) - lookup[i] = pow(i / 255.0, 1.0 / 1.8) * 255.0; - */ - - const unsigned char lookup[0x100] = { - 0x00, 0x0B, 0x11, 0x15, 0x19, 0x1C, 0x1F, 0x22, 0x25, 0x27, 0x2A, 0x2C, 0x2E, 0x30, 0x32, 0x34, - 0x36, 0x38, 0x3A, 0x3C, 0x3D, 0x3F, 0x41, 0x43, 0x44, 0x46, 0x47, 0x49, 0x4A, 0x4C, 0x4D, 0x4F, - 0x50, 0x51, 0x53, 0x54, 0x55, 0x57, 0x58, 0x59, 0x5B, 0x5C, 0x5D, 0x5E, 0x60, 0x61, 0x62, 0x63, - 0x64, 0x65, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, - 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x84, - 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, - 0x94, 0x95, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0x9F, 0xA0, - 0xA1, 0xA2, 0xA3, 0xA3, 0xA4, 0xA5, 0xA6, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAA, 0xAB, 0xAC, 0xAD, - 0xAD, 0xAE, 0xAF, 0xB0, 0xB0, 0xB1, 0xB2, 0xB3, 0xB3, 0xB4, 0xB5, 0xB6, 0xB6, 0xB7, 0xB8, 0xB8, - 0xB9, 0xBA, 0xBB, 0xBB, 0xBC, 0xBD, 0xBD, 0xBE, 0xBF, 0xBF, 0xC0, 0xC1, 0xC2, 0xC2, 0xC3, 0xC4, - 0xC4, 0xC5, 0xC6, 0xC6, 0xC7, 0xC8, 0xC8, 0xC9, 0xCA, 0xCA, 0xCB, 0xCC, 0xCC, 0xCD, 0xCE, 0xCE, - 0xCF, 0xD0, 0xD0, 0xD1, 0xD2, 0xD2, 0xD3, 0xD4, 0xD4, 0xD5, 0xD6, 0xD6, 0xD7, 0xD7, 0xD8, 0xD9, - 0xD9, 0xDA, 0xDB, 0xDB, 0xDC, 0xDC, 0xDD, 0xDE, 0xDE, 0xDF, 0xE0, 0xE0, 0xE1, 0xE1, 0xE2, 0xE3, - 0xE3, 0xE4, 0xE4, 0xE5, 0xE6, 0xE6, 0xE7, 0xE7, 0xE8, 0xE9, 0xE9, 0xEA, 0xEA, 0xEB, 0xEC, 0xEC, - 0xED, 0xED, 0xEE, 0xEF, 0xEF, 0xF0, 0xF0, 0xF1, 0xF1, 0xF2, 0xF3, 0xF3, 0xF4, 0xF4, 0xF5, 0xF5, - 0xF6, 0xF7, 0xF7, 0xF8, 0xF8, 0xF9, 0xF9, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC, 0xFD, 0xFD, 0xFE, 0xFF - } - - return lookup[value]; -} - SDL_Window* Backend_CreateWindow(const char *title, int width, int height) { return SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, 0); @@ -189,7 +159,7 @@ BOOL Backend_SupportsSubpixelGlyph(void) return FALSE; // SDL_Surfaces don't have per-component alpha } -Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned short total_greys, unsigned char pixel_mode) +Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned char pixel_mode) { Backend_Glyph *glyph = (Backend_Glyph*)malloc(sizeof(Backend_Glyph)); @@ -219,7 +189,7 @@ Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width *destination_pointer++ = 0xFF; *destination_pointer++ = 0xFF; *destination_pointer++ = 0xFF; - *destination_pointer++ = GammaCorrect((*source_pointer++ * 0xFF) / (total_greys - 1)); + *destination_pointer++ = *source_pointer++; } } diff --git a/src/Backends/Rendering/SDLTexture.cpp b/src/Backends/Rendering/SDLTexture.cpp index d5f972fd..eb334de6 100644 --- a/src/Backends/Rendering/SDLTexture.cpp +++ b/src/Backends/Rendering/SDLTexture.cpp @@ -81,36 +81,6 @@ static void RectToSDLRect(const RECT *rect, SDL_Rect *sdl_rect) sdl_rect->h = 0; } -static unsigned char GammaCorrect(unsigned char value) -{ - /* - Generated with... - for (unsigned int i = 0; i < 0x100; ++i) - lookup[i] = pow(i / 255.0, 1.0 / 1.8) * 255.0; - */ - - const unsigned char lookup[0x100] = { - 0x00, 0x0B, 0x11, 0x15, 0x19, 0x1C, 0x1F, 0x22, 0x25, 0x27, 0x2A, 0x2C, 0x2E, 0x30, 0x32, 0x34, - 0x36, 0x38, 0x3A, 0x3C, 0x3D, 0x3F, 0x41, 0x43, 0x44, 0x46, 0x47, 0x49, 0x4A, 0x4C, 0x4D, 0x4F, - 0x50, 0x51, 0x53, 0x54, 0x55, 0x57, 0x58, 0x59, 0x5B, 0x5C, 0x5D, 0x5E, 0x60, 0x61, 0x62, 0x63, - 0x64, 0x65, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, - 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x84, - 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, - 0x94, 0x95, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0x9F, 0xA0, - 0xA1, 0xA2, 0xA3, 0xA3, 0xA4, 0xA5, 0xA6, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAA, 0xAB, 0xAC, 0xAD, - 0xAD, 0xAE, 0xAF, 0xB0, 0xB0, 0xB1, 0xB2, 0xB3, 0xB3, 0xB4, 0xB5, 0xB6, 0xB6, 0xB7, 0xB8, 0xB8, - 0xB9, 0xBA, 0xBB, 0xBB, 0xBC, 0xBD, 0xBD, 0xBE, 0xBF, 0xBF, 0xC0, 0xC1, 0xC2, 0xC2, 0xC3, 0xC4, - 0xC4, 0xC5, 0xC6, 0xC6, 0xC7, 0xC8, 0xC8, 0xC9, 0xCA, 0xCA, 0xCB, 0xCC, 0xCC, 0xCD, 0xCE, 0xCE, - 0xCF, 0xD0, 0xD0, 0xD1, 0xD2, 0xD2, 0xD3, 0xD4, 0xD4, 0xD5, 0xD6, 0xD6, 0xD7, 0xD7, 0xD8, 0xD9, - 0xD9, 0xDA, 0xDB, 0xDB, 0xDC, 0xDC, 0xDD, 0xDE, 0xDE, 0xDF, 0xE0, 0xE0, 0xE1, 0xE1, 0xE2, 0xE3, - 0xE3, 0xE4, 0xE4, 0xE5, 0xE6, 0xE6, 0xE7, 0xE7, 0xE8, 0xE9, 0xE9, 0xEA, 0xEA, 0xEB, 0xEC, 0xEC, - 0xED, 0xED, 0xEE, 0xEF, 0xEF, 0xF0, 0xF0, 0xF1, 0xF1, 0xF2, 0xF3, 0xF3, 0xF4, 0xF4, 0xF5, 0xF5, - 0xF6, 0xF7, 0xF7, 0xF8, 0xF8, 0xF9, 0xF9, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC, 0xFD, 0xFD, 0xFE, 0xFF - } - - return lookup[value]; -} - SDL_Window* Backend_CreateWindow(const char *title, int width, int height) { return SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, 0); @@ -348,7 +318,7 @@ BOOL Backend_SupportsSubpixelGlyph(void) return FALSE; // SDL_Textures don't have per-component alpha } -Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned short total_greys, unsigned char pixel_mode) +Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned char pixel_mode) { Backend_Glyph *glyph = (Backend_Glyph*)malloc(sizeof(Backend_Glyph)); @@ -381,7 +351,7 @@ Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width *destination_pointer++ = 0xFF; *destination_pointer++ = 0xFF; *destination_pointer++ = 0xFF; - *destination_pointer++ = GammaCorrect((*source_pointer++ * 0xFF) / (total_greys - 1)); + *destination_pointer++ = *source_pointer++; } } diff --git a/src/Backends/Rendering/Software.cpp b/src/Backends/Rendering/Software.cpp index c830d75b..179036eb 100644 --- a/src/Backends/Rendering/Software.cpp +++ b/src/Backends/Rendering/Software.cpp @@ -35,36 +35,6 @@ static SDL_Surface *screen_surface; static Backend_Surface framebuffer; -static unsigned char GammaCorrect(unsigned char value) -{ - /* - Generated with... - for (unsigned int i = 0; i < 0x100; ++i) - lookup[i] = pow(i / 255.0, 1.0 / 1.8) * 255.0; - */ - - const unsigned char lookup[0x100] = { - 0x00, 0x0B, 0x11, 0x15, 0x19, 0x1C, 0x1F, 0x22, 0x25, 0x27, 0x2A, 0x2C, 0x2E, 0x30, 0x32, 0x34, - 0x36, 0x38, 0x3A, 0x3C, 0x3D, 0x3F, 0x41, 0x43, 0x44, 0x46, 0x47, 0x49, 0x4A, 0x4C, 0x4D, 0x4F, - 0x50, 0x51, 0x53, 0x54, 0x55, 0x57, 0x58, 0x59, 0x5B, 0x5C, 0x5D, 0x5E, 0x60, 0x61, 0x62, 0x63, - 0x64, 0x65, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, - 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x84, - 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, - 0x94, 0x95, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0x9F, 0xA0, - 0xA1, 0xA2, 0xA3, 0xA3, 0xA4, 0xA5, 0xA6, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAA, 0xAB, 0xAC, 0xAD, - 0xAD, 0xAE, 0xAF, 0xB0, 0xB0, 0xB1, 0xB2, 0xB3, 0xB3, 0xB4, 0xB5, 0xB6, 0xB6, 0xB7, 0xB8, 0xB8, - 0xB9, 0xBA, 0xBB, 0xBB, 0xBC, 0xBD, 0xBD, 0xBE, 0xBF, 0xBF, 0xC0, 0xC1, 0xC2, 0xC2, 0xC3, 0xC4, - 0xC4, 0xC5, 0xC6, 0xC6, 0xC7, 0xC8, 0xC8, 0xC9, 0xCA, 0xCA, 0xCB, 0xCC, 0xCC, 0xCD, 0xCE, 0xCE, - 0xCF, 0xD0, 0xD0, 0xD1, 0xD2, 0xD2, 0xD3, 0xD4, 0xD4, 0xD5, 0xD6, 0xD6, 0xD7, 0xD7, 0xD8, 0xD9, - 0xD9, 0xDA, 0xDB, 0xDB, 0xDC, 0xDC, 0xDD, 0xDE, 0xDE, 0xDF, 0xE0, 0xE0, 0xE1, 0xE1, 0xE2, 0xE3, - 0xE3, 0xE4, 0xE4, 0xE5, 0xE6, 0xE6, 0xE7, 0xE7, 0xE8, 0xE9, 0xE9, 0xEA, 0xEA, 0xEB, 0xEC, 0xEC, - 0xED, 0xED, 0xEE, 0xEF, 0xEF, 0xF0, 0xF0, 0xF1, 0xF1, 0xF2, 0xF3, 0xF3, 0xF4, 0xF4, 0xF5, 0xF5, - 0xF6, 0xF7, 0xF7, 0xF8, 0xF8, 0xF9, 0xF9, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC, 0xFD, 0xFD, 0xFE, 0xFF - } - - return lookup[value]; -} - SDL_Window* Backend_CreateWindow(const char *title, int width, int height) { return SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, 0); @@ -306,7 +276,7 @@ BOOL Backend_SupportsSubpixelGlyph(void) return TRUE; // It's a software renderer, baby } -Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned short total_greys, unsigned char pixel_mode) +Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width, unsigned int height, int pitch, unsigned char pixel_mode) { Backend_Glyph *glyph = (Backend_Glyph*)malloc(sizeof(Backend_Glyph)); @@ -316,36 +286,9 @@ Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width switch (pixel_mode) { case FONT_PIXEL_MODE_LCD: - { - glyph->pixels = malloc(width * height * sizeof(double) * 3); - - if (glyph->pixels == NULL) - { - free(glyph); - return NULL; - } - - double *destination_pointer = (double*)glyph->pixels; - - for (unsigned int y = 0; y < height; ++y) - { - const unsigned char *source_pointer = pixels + y * pitch; - - for (unsigned int x = 0; x < width; ++x) - { - for (unsigned int i = 0; i < 3; ++i) - { - *destination_pointer++ = GammaCorrect(*source_pointer++); - } - } - } - - break; - } - case FONT_PIXEL_MODE_GRAY: { - glyph->pixels = malloc(width * height * sizeof(double)); + glyph->pixels = malloc(width * height * sizeof(float)); if (glyph->pixels == NULL) { @@ -353,16 +296,14 @@ Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width return NULL; } - double *destination_pointer = (double*)glyph->pixels; + float *destination_pointer = (float*)glyph->pixels; for (unsigned int y = 0; y < height; ++y) { const unsigned char *source_pointer = pixels + y * pitch; for (unsigned int x = 0; x < width; ++x) - { - *destination_pointer++ = GammaCorrect((*source_pointer++ * 0xFF) / (total_greys - 1)); - } + *destination_pointer++ = *source_pointer++ / 255.0f; } break; @@ -390,7 +331,7 @@ Backend_Glyph* Backend_LoadGlyph(const unsigned char *pixels, unsigned int width } } - glyph->width = width; + glyph->width = (pixel_mode == FONT_PIXEL_MODE_LCD ? width / 3 : width); glyph->height = height; glyph->pixel_mode = pixel_mode; @@ -418,7 +359,7 @@ void Backend_DrawGlyph(Backend_Surface *surface, Backend_Glyph *glyph, long x, l { for (unsigned int ix = MAX(-x, 0); x + ix < MIN(x + glyph->width, surface->width); ++ix) { - const double *font_pixel = (double*)glyph->pixels + (iy * glyph->width + ix) * 3; + const float *font_pixel = (float*)glyph->pixels + (iy * glyph->width + ix) * 3; if (font_pixel[0] || font_pixel[1] || font_pixel[2]) { @@ -426,8 +367,8 @@ void Backend_DrawGlyph(Backend_Surface *surface, Backend_Glyph *glyph, long x, l for (unsigned int j = 0; j < 3; ++j) { - const double alpha = font_pixel[j]; - bitmap_pixel[j] = (unsigned char)((colours[j] * alpha) + (bitmap_pixel[j] * (1.0 - alpha))); // Alpha blending + const float alpha = font_pixel[j]; + bitmap_pixel[j] = (unsigned char)((colours[j] * alpha) + (bitmap_pixel[j] * (1.0f - alpha))); // Alpha blending } } } @@ -440,14 +381,14 @@ void Backend_DrawGlyph(Backend_Surface *surface, Backend_Glyph *glyph, long x, l { for (unsigned int ix = MAX(-x, 0); x + ix < MIN(x + glyph->width, surface->width); ++ix) { - const double alpha = ((double*)glyph->pixels)[iy * glyph->width + ix]; + const float alpha = ((float*)glyph->pixels)[iy * glyph->width + ix]; if (alpha) { unsigned char *bitmap_pixel = surface->pixels + (y + iy) * surface->pitch + (x + ix) * 3; for (unsigned int j = 0; j < 3; ++j) - bitmap_pixel[j] = (unsigned char)((colours[j] * alpha) + (bitmap_pixel[j] * (1.0 - alpha))); // Alpha blending + bitmap_pixel[j] = (unsigned char)((colours[j] * alpha) + (bitmap_pixel[j] * (1.0f - alpha))); // Alpha blending } } } diff --git a/src/Font.cpp b/src/Font.cpp index 73a55402..6970b758 100644 --- a/src/Font.cpp +++ b/src/Font.cpp @@ -1709,6 +1709,36 @@ static unsigned long UTF8ToUnicode(const unsigned char *string, unsigned int *by } #endif +static unsigned char GammaCorrect(unsigned char value) +{ + /* + Generated with... + for (unsigned int i = 0; i < 0x100; ++i) + lookup[i] = pow(i / 255.0, 1.0 / 1.8) * 255.0; + */ + + const unsigned char lookup[0x100] = { + 0x00, 0x0B, 0x11, 0x15, 0x19, 0x1C, 0x1F, 0x22, 0x25, 0x27, 0x2A, 0x2C, 0x2E, 0x30, 0x32, 0x34, + 0x36, 0x38, 0x3A, 0x3C, 0x3D, 0x3F, 0x41, 0x43, 0x44, 0x46, 0x47, 0x49, 0x4A, 0x4C, 0x4D, 0x4F, + 0x50, 0x51, 0x53, 0x54, 0x55, 0x57, 0x58, 0x59, 0x5B, 0x5C, 0x5D, 0x5E, 0x60, 0x61, 0x62, 0x63, + 0x64, 0x65, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, + 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83, 0x84, 0x84, + 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, + 0x94, 0x95, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0x9F, 0xA0, + 0xA1, 0xA2, 0xA3, 0xA3, 0xA4, 0xA5, 0xA6, 0xA6, 0xA7, 0xA8, 0xA9, 0xAA, 0xAA, 0xAB, 0xAC, 0xAD, + 0xAD, 0xAE, 0xAF, 0xB0, 0xB0, 0xB1, 0xB2, 0xB3, 0xB3, 0xB4, 0xB5, 0xB6, 0xB6, 0xB7, 0xB8, 0xB8, + 0xB9, 0xBA, 0xBB, 0xBB, 0xBC, 0xBD, 0xBD, 0xBE, 0xBF, 0xBF, 0xC0, 0xC1, 0xC2, 0xC2, 0xC3, 0xC4, + 0xC4, 0xC5, 0xC6, 0xC6, 0xC7, 0xC8, 0xC8, 0xC9, 0xCA, 0xCA, 0xCB, 0xCC, 0xCC, 0xCD, 0xCE, 0xCE, + 0xCF, 0xD0, 0xD0, 0xD1, 0xD2, 0xD2, 0xD3, 0xD4, 0xD4, 0xD5, 0xD6, 0xD6, 0xD7, 0xD7, 0xD8, 0xD9, + 0xD9, 0xDA, 0xDB, 0xDB, 0xDC, 0xDC, 0xDD, 0xDE, 0xDE, 0xDF, 0xE0, 0xE0, 0xE1, 0xE1, 0xE2, 0xE3, + 0xE3, 0xE4, 0xE4, 0xE5, 0xE6, 0xE6, 0xE7, 0xE7, 0xE8, 0xE9, 0xE9, 0xEA, 0xEA, 0xEB, 0xEC, 0xEC, + 0xED, 0xED, 0xEE, 0xEF, 0xEF, 0xF0, 0xF0, 0xF1, 0xF1, 0xF2, 0xF3, 0xF3, 0xF4, 0xF4, 0xF5, 0xF5, + 0xF6, 0xF7, 0xF7, 0xF8, 0xF8, 0xF9, 0xF9, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC, 0xFD, 0xFD, 0xFE, 0xFF + }; + + return lookup[value]; +} + static CachedGlyph* GetGlyphCached(FontObject *font_object, unsigned long unicode_value) { CachedGlyph *glyph; @@ -1746,10 +1776,34 @@ static CachedGlyph* GetGlyphCached(FontObject *font_object, unsigned long unicod { case FT_PIXEL_MODE_LCD: pixel_mode = FONT_PIXEL_MODE_LCD; + + for (unsigned int y = 0; y < bitmap.rows; ++y) + { + unsigned char *pixel_pointer = bitmap.buffer + y * bitmap.pitch; + + for (unsigned int x = 0; x < bitmap.width; ++x) + { + *pixel_pointer = GammaCorrect(*pixel_pointer); + ++pixel_pointer; + } + } + break; case FT_PIXEL_MODE_GRAY: pixel_mode = FONT_PIXEL_MODE_GRAY; + + for (unsigned int y = 0; y < bitmap.rows; ++y) + { + unsigned char *pixel_pointer = bitmap.buffer + y * bitmap.pitch; + + for (unsigned int x = 0; x < bitmap.width; ++x) + { + *pixel_pointer = GammaCorrect((*pixel_pointer * 0xFF) / (bitmap.num_grays - 1)); + ++pixel_pointer; + } + } + break; case FT_PIXEL_MODE_MONO: @@ -1757,7 +1811,7 @@ static CachedGlyph* GetGlyphCached(FontObject *font_object, unsigned long unicod break; } - glyph->backend = Backend_LoadGlyph(bitmap.buffer, pixel_mode == FONT_PIXEL_MODE_LCD ? bitmap.width / 3 : bitmap.width, bitmap.rows, bitmap.pitch, bitmap.num_grays, pixel_mode); + glyph->backend = Backend_LoadGlyph(bitmap.buffer, bitmap.width, bitmap.rows, bitmap.pitch, pixel_mode); FT_Bitmap_Done(font_object->library, &bitmap); }