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PDCursesMod
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PDCursesMod/gl/pdcscrn.c

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/* PDCurses */
#include "pdcgl.h"
#define GLFUNC_IMPL
#include "glfuncs.h"
#include <stdlib.h>
#include <limits.h>
#include "../common/iconbmp.h"
#include "../common/pdccolor.h"
#include "../common/pdccolor.c"
#ifndef PDC_FONT_PATH
# ifdef _WIN32
# define PDC_FONT_PATH "C:/Windows/Fonts/consola.ttf"
# elif defined(__APPLE__)
# define PDC_FONT_PATH "/System/Library/Fonts/Menlo.ttc"
# else
# define PDC_FONT_PATH "/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf"
# define PDC_FONT_PATH2 "/usr/share/fonts/dejavu-sans-mono-fonts/DejaVuSansMono.ttf"
# endif
#endif
TTF_Font *pdc_ttffont = NULL;
int pdc_font_size =
#ifdef _WIN32
16;
#else
17;
#endif
int pdc_resize_mode = PDC_GL_RESIZE_NORMAL;
int pdc_interpolation_mode = PDC_GL_INTERPOLATE_BILINEAR;
Uint32 *pdc_glyph_cache[4] = {NULL, NULL, NULL, NULL};
int pdc_glyph_cache_size[4] = {0, 0, 0, 0};
int pdc_glyph_row_capacity = 0, pdc_glyph_col_capacity = 0;
int pdc_glyph_cache_w = 0, pdc_glyph_cache_h = 0;
int* pdc_glyph_start_col = NULL;
SDL_Window *pdc_window = NULL;
SDL_Surface *pdc_icon = NULL;
int pdc_sheight = 0, pdc_swidth = 0;
int pdc_fheight, pdc_fwidth, pdc_fthick;
unsigned pdc_color_buffer = 0, pdc_glyph_buffer = 0;
unsigned pdc_background_shader_program = 0, pdc_foreground_shader_program = 0;
unsigned pdc_font_texture = 0, pdc_render_target_texture = 0;
unsigned pdc_tex_fbo = 0;
static GLuint pdc_vao = 0;
static SDL_GLContext pdc_gl_context = NULL;
/* The same vertex shader is used in both shader programs, the one that draws
* the background colors and the one that draws the foreground glyphs. Vertex
* attribs are actually instance attributes here, and vertices are just
* calculated on-the-fly instead of being read from a buffer.
*/
static const char* pdc_vertex_shader_src =
"#version 330 core\n"
"layout(location = 0) in uint v_bg;\n"
"layout(location = 1) in uint v_fg;\n"
"layout(location = 2) in uint v_glyph;\n"
"uniform ivec2 screen_size;\n"
"out vertex_data {\n"
" flat ivec2 glyph_offset;\n"
" flat int attr;\n"
" vec3 bg;\n"
" vec3 fg;\n"
" vec2 uv;\n"
"} v_out;\n"
"const vec2[6] uv_table = vec2[](\n"
" vec2(0, 0),\n"
" vec2(0, 1),\n"
" vec2(1, 0),\n"
" vec2(0, 1),\n"
" vec2(1, 1),\n"
" vec2(1, 0)\n"
");\n"
"void main(void)\n"
"{\n"
" int cell_index = gl_InstanceID;\n"
" vec2 uv = uv_table[gl_VertexID%6];\n"
" int x = cell_index % screen_size.x;\n"
" int y = cell_index / screen_size.x;\n"
" uv.x *= float(v_glyph >> 30);\n"
" vec2 pos = 2.0f * (vec2(x, y)+uv)/vec2(screen_size) - 1.0f;\n"
" gl_Position = vec4(pos.x, -pos.y, 0.0f, 1.0f);\n"
" v_out.glyph_offset = ivec2(int(v_glyph&0x7FFFu), int(v_glyph>>15u&0x7FFFu));\n"
" v_out.attr = int(v_fg>>24);\n"
" v_out.bg = vec3((v_bg&0xFFu), (v_bg>>8u)&0xFFu, (v_bg>>16u)&0xFFu)/float(0xFF);\n"
" v_out.fg = vec3((v_fg&0xFFu), (v_fg>>8u)&0xFFu, (v_fg>>16u)&0xFFu)/float(0xFF);\n"
" v_out.uv = uv;\n"
"}\n";
static const char* pdc_background_fragment_shader_src =
"#version 330 core\n"
"in vertex_data {\n"
" flat ivec2 glyph_offset;\n"
" flat int attr;\n"
" vec3 bg;\n"
" vec3 fg;\n"
" vec2 uv;\n"
"} v_in;\n"
"out vec4 color;\n"
"void main(void)\n"
"{\n"
" color = vec4(v_in.bg, 1.0f);\n"
"}\n";
static const char* pdc_foreground_fragment_shader_src =
"#version 330 core\n"
"in vertex_data {\n"
" flat ivec2 glyph_offset;\n"
" flat int attr;\n"
" vec3 bg;\n"
" vec3 fg;\n"
" vec2 uv;\n"
"} v_in;\n"
"out vec4 color;\n"
"uniform sampler2D glyphs;\n"
"uniform int fthick;\n"
"uniform ivec2 glyph_size;\n"
"uniform vec3 line_color;\n"
"void main(void)\n"
"{\n"
" float g_alpha = 0;\n"
" ivec2 coord = ivec2(v_in.uv * glyph_size);\n"
" if(v_in.glyph_offset.x > 0 || v_in.glyph_offset.y > 0)\n"
" g_alpha = texelFetch(glyphs, v_in.glyph_offset * glyph_size + coord, 0).r;\n"
" if(((v_in.attr & 1) != 0 && coord.y >= 0.75 * glyph_size.y) || (v_in.attr & 2) != 0)\n"
" g_alpha = 1 - g_alpha;\n"
" vec3 c = v_in.fg;\n"
" if(\n"
" ((v_in.attr & (1<<2)) != 0 && coord.y >= glyph_size.y-fthick) ||\n" /* Underline */
" ((v_in.attr & (1<<3)) != 0 && coord.y < fthick) ||\n" /* Overline */
" ((v_in.attr & (1<<4)) != 0 && coord.y >= glyph_size.y/2-fthick && coord.y < glyph_size.y/2) ||\n" /* Strikeout */
" ((v_in.attr & (1<<5)) != 0 && coord.x < fthick) ||\n" /* Left */
" ((v_in.attr & (1<<6)) != 0 && coord.x >= glyph_size.x-fthick)\n" /* Right */
" ){\n"
" c = all(greaterThanEqual(line_color, vec3(0))) ? line_color : v_in.fg;\n"
" g_alpha = 1.0f;\n"
" }\n"
" color = vec4(c, g_alpha);\n"
"}\n";
static void _clean(void)
{
int i;
if (pdc_ttffont)
{
TTF_CloseFont(pdc_ttffont);
TTF_Quit();
pdc_ttffont = NULL;
}
for(i = 0; i < 4; ++i)
{
if(pdc_glyph_cache[i])
free(pdc_glyph_cache[i]);
pdc_glyph_cache[i] = NULL;
pdc_glyph_cache_size[i] = 0;
}
if(pdc_glyph_start_col)
{
free(pdc_glyph_start_col);
pdc_glyph_start_col = NULL;
}
if( pdc_icon)
SDL_FreeSurface(pdc_icon);
pdc_icon = NULL;
if(pdc_tex_fbo)
glDeleteFramebuffers(1, &pdc_tex_fbo);
if(pdc_font_texture)
glDeleteTextures(1, &pdc_font_texture);
if(pdc_render_target_texture)
glDeleteTextures(1, &pdc_render_target_texture);
if(pdc_vao)
glDeleteVertexArrays(1, &pdc_vao);
if(pdc_color_buffer)
glDeleteBuffers(1, &pdc_color_buffer);
if(pdc_glyph_buffer)
glDeleteBuffers(1, &pdc_glyph_buffer);
if(pdc_foreground_shader_program)
glDeleteProgram(pdc_foreground_shader_program);
if(pdc_background_shader_program)
glDeleteProgram(pdc_background_shader_program);
pdc_tex_fbo = pdc_font_texture = pdc_render_target_texture = pdc_vao =
pdc_color_buffer = pdc_glyph_buffer = pdc_background_shader_program =
pdc_foreground_shader_program = 0;
if(pdc_gl_context)
{
SDL_GL_DeleteContext(pdc_gl_context);
pdc_gl_context = NULL;
}
if(pdc_window)
{
SDL_DestroyWindow(pdc_window);
pdc_window = NULL;
}
SDL_Quit();
pdc_sheight = pdc_swidth = 0;
}
static void add_shader(
GLuint shader_program,
GLenum shader_type,
const char* src
){
GLint status = GL_FALSE;
GLuint shader = glCreateShader(shader_type);
glShaderSource(shader, 1, &src, NULL);
glCompileShader(shader);
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if(status != GL_TRUE)
{
char* err;
GLsizei length = 0;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length);
err = malloc(length+1);
glGetShaderInfoLog(shader, length+1, &length, err);
fprintf(stderr, "%s shader compilation error: %s\n",
(shader_type == GL_VERTEX_SHADER ? "Vertex" : "Fragment"),
err
);
exit(1);
}
glAttachShader(shader_program, shader);
glDeleteShader(shader);
}
static void build_shader_program(GLuint shader_program)
{
GLint status = GL_FALSE;
glLinkProgram(shader_program);
glGetProgramiv(shader_program, GL_LINK_STATUS, &status);
if(status != GL_TRUE)
{
char* err;
GLsizei length = 0;
glGetProgramiv(shader_program, GL_INFO_LOG_LENGTH, &length);
err = malloc(length+1);
glGetProgramInfoLog(shader_program, length+1, &length, err);
fprintf(stderr, "Shader program linking: %s\n", err);
exit(1);
}
}
void PDC_scr_close(void)
{
PDC_LOG(("PDC_scr_close() - called\n"));
}
void PDC_scr_free(void)
{
PDC_free_palette( );
_clean( );
}
/* find the display where the mouse pointer is */
int _get_displaynum(void)
{
SDL_Rect size;
int i, xpos, ypos, displays;
displays = SDL_GetNumVideoDisplays();
if (displays > 1)
{
SDL_GetGlobalMouseState(&xpos, &ypos);
for (i = 0; i < displays; i++)
{
SDL_GetDisplayBounds(i, &size);
if (size.x <= xpos && xpos < size.x + size.w &&
size.y <= ypos && ypos < size.y + size.h)
return i;
}
}
return 0;
}
/* open the physical screen -- miscellaneous initialization */
int PDC_scr_open(void)
{
int displaynum = 0;
int h, w;
const char *ptsz, *fname;
const char *resize_mode = getenv( "PDC_RESIZE");
if( resize_mode)
pdc_resize_mode = atoi( resize_mode);
PDC_LOG(("PDC_scr_open() - called\n"));
if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER|SDL_INIT_EVENTS) < 0)
{
fprintf(stderr, "Could not start SDL: %s\n", SDL_GetError());
return ERR;
}
atexit(_clean);
displaynum = _get_displaynum();
if (TTF_Init() == -1)
{
fprintf(stderr, "Could not start SDL_TTF: %s\n", SDL_GetError());
return ERR;
}
ptsz = getenv("PDC_FONT_SIZE");
if (ptsz != NULL)
pdc_font_size = atoi(ptsz);
if (pdc_font_size <= 0)
pdc_font_size = 18;
fname = getenv("PDC_FONT");
pdc_ttffont = TTF_OpenFont(fname ? fname : PDC_FONT_PATH,
pdc_font_size);
# ifdef PDC_FONT_PATH2
if (!pdc_ttffont && !fname)
{
pdc_ttffont = TTF_OpenFont(PDC_FONT_PATH2,
pdc_font_size);
}
# endif
if (!pdc_ttffont)
{
if (fname)
fprintf(stderr, "Could not load specified font: %s\n",fname);
else
{
# ifdef PDC_FONT_PATH2
fprintf(stderr, "Could not load default font: %s or %s\n",
PDC_FONT_PATH, PDC_FONT_PATH2);
# else
fprintf(stderr, "Could not load default font: %s\n",
PDC_FONT_PATH);
# endif
}
return ERR;
}
TTF_SetFontKerning(pdc_ttffont, 0);
TTF_SetFontHinting(pdc_ttffont, TTF_HINTING_MONO);
SP->mono = FALSE;
SP->orig_attr = FALSE;
TTF_SizeText(pdc_ttffont, "W", &pdc_fwidth, &pdc_fheight);
pdc_fthick = pdc_font_size / 20 + 1;
if (!pdc_icon)
{
const char *iname = getenv("PDC_ICON");
pdc_icon = SDL_LoadBMP(iname ? iname : "pdcicon.bmp");
if (!pdc_icon)
pdc_icon = SDL_LoadBMP_RW(SDL_RWFromMem(iconbmp,
sizeof(iconbmp)), 0);
}
if( !pdc_sheight)
{
const char *env = getenv("PDC_LINES");
pdc_sheight = (env ? atoi(env) : 25);
}
pdc_sheight *= pdc_fheight;
if( !pdc_swidth)
{
const char *env = getenv("PDC_COLS");
pdc_swidth = (env ? atoi(env) : 80);
}
pdc_swidth *= pdc_fwidth;
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
SDL_GL_SetAttribute(
SDL_GL_CONTEXT_PROFILE_MASK,
SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 0);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 0);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 0);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 0);
pdc_window = SDL_CreateWindow("PDCurses",
SDL_WINDOWPOS_CENTERED_DISPLAY(displaynum),
SDL_WINDOWPOS_CENTERED_DISPLAY(displaynum),
pdc_swidth, pdc_sheight,
SDL_WINDOW_RESIZABLE|SDL_WINDOW_OPENGL);
if (pdc_window == NULL)
{
fprintf(stderr, "Could not open SDL window: %s\n", SDL_GetError());
return ERR;
}
SDL_SetWindowIcon(pdc_window, pdc_icon);
SDL_GetWindowSize(pdc_window, &w, &h);
if (!pdc_sheight) pdc_sheight = h;
if (!pdc_swidth) pdc_swidth = w;
pdc_gl_context = SDL_GL_CreateContext(pdc_window);
if (pdc_gl_context == NULL)
{
fprintf(stderr, "Could not open OpenGL context: %s\n", SDL_GetError());
return ERR;
}
SDL_GL_MakeCurrent(pdc_window, pdc_gl_context);
SDL_GL_SetSwapInterval(0);
/* Load the GL functions we use. */
load_gl_funcs();
/* Build foreground shader. */
pdc_foreground_shader_program = glCreateProgram();
add_shader(
pdc_foreground_shader_program,
GL_VERTEX_SHADER,
pdc_vertex_shader_src
);
add_shader(
pdc_foreground_shader_program,
GL_FRAGMENT_SHADER,
pdc_foreground_fragment_shader_src
);
build_shader_program(pdc_foreground_shader_program);
/* Build background shader. */
pdc_background_shader_program = glCreateProgram();
add_shader(
pdc_background_shader_program,
GL_VERTEX_SHADER,
pdc_vertex_shader_src
);
add_shader(
pdc_background_shader_program,
GL_FRAGMENT_SHADER,
pdc_background_fragment_shader_src
);
build_shader_program(pdc_background_shader_program);
/* A VAO is just needed in OpenGL 3.3, even though we don't ever change the
* vertex attribs...
*/
glGenVertexArrays(1, &pdc_vao);
glBindVertexArray(pdc_vao);
glGenBuffers(1, &pdc_color_buffer);
glGenBuffers(1, &pdc_glyph_buffer);
glBindBuffer(GL_ARRAY_BUFFER, pdc_color_buffer);
/* See 'struct color_data' in pdcdisp.c, these map the contents of that
* struct into the vertex shader inputs.
*/
glEnableVertexAttribArray(0);
glVertexAttribIPointer(
0, 1, GL_INT, 2 * sizeof(Uint32), (void*)(0 * sizeof(Uint32)));
glVertexAttribDivisor(0, 1);
glEnableVertexAttribArray(1);
glVertexAttribIPointer(
1, 1, GL_INT, 2 * sizeof(Uint32), (void*)(1 * sizeof(Uint32)));
glVertexAttribDivisor(1, 1);
/* The glyph buffer is separate, because that makes rendering multiple
* character layers (needed for combining characters) faster and simpler.
*/
glBindBuffer(GL_ARRAY_BUFFER, pdc_glyph_buffer);
glEnableVertexAttribArray(2);
glVertexAttribIPointer(2, 1, GL_INT, sizeof(Uint32), NULL);
glVertexAttribDivisor(2, 1);
glUniform1i(
glGetUniformLocation(pdc_foreground_shader_program, "glyphs"), 0);
/* This FBO is not only used in the bilinear filtering mode, but also
* temporarily in various glyph cache operations.
*/
glGenFramebuffers(1, &pdc_tex_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, pdc_tex_fbo);
glDrawBuffer(GL_COLOR_ATTACHMENT0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
/* Glyphs are alpha-blended on top of the background (and each other, if
* combing chars)
*/
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
SDL_StartTextInput();
PDC_mouse_set();
SP->mouse_wait = PDC_CLICK_PERIOD;
SP->audible = FALSE;
SP->termattrs = A_COLOR | WA_UNDERLINE | WA_LEFT | WA_RIGHT |
WA_REVERSE | WA_STRIKEOUT | WA_TOP | WA_BLINK | WA_DIM | WA_BOLD;
#ifdef PDC_WIDE
SP->termattrs |= A_ITALIC;
#endif
PDC_reset_prog_mode();
return OK;
}
/* the core of resize_term() */
int PDC_resize_screen(int nlines, int ncols)
{
if( !stdscr) /* Specifying the initial screen size */
{ /* before calling initscr(). */
pdc_sheight = nlines;
pdc_swidth = ncols;
return OK;
}
if (nlines && ncols)
{
#if SDL_VERSION_ATLEAST(2, 0, 5)
SDL_Rect max;
int top, left, bottom, right;
SDL_GetDisplayUsableBounds(0, &max);
SDL_GetWindowBordersSize(pdc_window, &top, &left, &bottom, &right);
max.h -= top + bottom;
max.w -= left + right;
while (nlines * pdc_fheight > max.h)
nlines--;
while (ncols * pdc_fwidth > max.w)
ncols--;
#endif
pdc_sheight = nlines * pdc_fheight;
pdc_swidth = ncols * pdc_fwidth;
SDL_SetWindowSize(pdc_window, pdc_swidth, pdc_sheight);
}
return OK;
}
void PDC_reset_prog_mode(void)
{
PDC_LOG(("PDC_reset_prog_mode() - called.\n"));
PDC_flushinp();
}
void PDC_reset_shell_mode(void)
{
PDC_LOG(("PDC_reset_shell_mode() - called.\n"));
PDC_flushinp();
}
void PDC_restore_screen_mode(int i)
{
INTENTIONALLY_UNUSED_PARAMETER( i);
}
void PDC_save_screen_mode(int i)
{
INTENTIONALLY_UNUSED_PARAMETER( i);
}
bool PDC_can_change_color(void)
{
return TRUE;
}
int PDC_color_content( int color, int *red, int *green, int *blue)
{
const PACKED_RGB col = PDC_get_palette_entry( color);
*red = DIVROUND( Get_RValue(col) * 1000, 255);
*green = DIVROUND( Get_GValue(col) * 1000, 255);
*blue = DIVROUND( Get_BValue(col) * 1000, 255);
return OK;
}
int PDC_init_color( int color, int red, int green, int blue)
{
const PACKED_RGB new_rgb = PACK_RGB(DIVROUND(red * 255, 1000),
DIVROUND(green * 255, 1000),
DIVROUND(blue * 255, 1000));
if( !PDC_set_palette_entry( color, new_rgb))
curscr->_clear = TRUE;
return OK;
}
/* Does nothing in the SDL flavors of PDCurses. That may change, eventually,
allowing one to limit the range of user-resizable windows. See X11 or Win32a
versions of this function for details. */
void PDC_set_resize_limits( const int new_min_lines, const int new_max_lines,
const int new_min_cols, const int new_max_cols)
{
INTENTIONALLY_UNUSED_PARAMETER( new_min_lines);
INTENTIONALLY_UNUSED_PARAMETER( new_max_lines);
INTENTIONALLY_UNUSED_PARAMETER( new_min_cols);
INTENTIONALLY_UNUSED_PARAMETER( new_max_cols);
}
SDL_Rect PDC_get_viewport(void)
{
int content_w = SP->cols * pdc_fwidth;
int content_h = SP->lines * pdc_fheight;
int scale = 0;
int w, h;
SDL_Rect rect;
SDL_GetWindowSize(pdc_window, &w, &h);
switch(pdc_resize_mode)
{
case PDC_GL_RESIZE_NORMAL:
rect.x = 0;
rect.y = h-content_h;
rect.w = content_w;
rect.h = content_h;
break;
case PDC_GL_RESIZE_STRETCH:
rect.x = 0;
rect.y = 0;
rect.w = w;
rect.h = h;
break;
case PDC_GL_RESIZE_SCALE:
if(content_h == 0) content_h = 1;
if(content_w == 0) content_w = 1;
if(w * content_h < content_w * h)
{
scale = content_h * w / content_w;
rect.x = 0;
rect.y = (h - scale)/2;
rect.w = w;
rect.h = scale;
}
else
{
scale = content_w * h / content_h;
rect.x = (w - scale)/2;
rect.y = 0;
rect.w = scale;
rect.h = h;
}
break;
case PDC_GL_RESIZE_INTEGER:
if(content_h == 0) content_h = 1;
if(content_w == 0) content_w = 1;
scale = h/content_h < w/content_w ? h/content_h : w/content_w;
if(scale <= 0) scale = 1;
content_w = scale * content_w;
content_h = scale * content_h;
rect.x = (w-content_w)/2;
rect.y = (h-content_h)/2;
rect.w = content_w;
rect.h = content_h;
break;
}
return rect;
}
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