NevolutionX/Sources/renderer.cpp at d0968c13722e07d96b10a5e0e68d7c976cc87fdc · dracc/NevolutionX · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
#include "renderer.hpp"
#include <SDL_image.h>
#include <algorithm>
#include <cmath>
#include "infoLog.hpp"

#ifdef NXDK
#include <hal/video.h>
#endif

// One line of text with the default font is 31 pixels high.
// FIXME: Should probably be dynamic and dependent of font settings.
const unsigned int FONT_TEX_SIZE = 31;

Renderer::Renderer() {
#ifdef NXDK
  VIDEO_MODE xmode = XVideoGetMode();
  height = xmode.height;
  width = xmode.width;
  windowFlags = SDL_WINDOW_SHOWN;
#else
  height = 480;
  width = 640;
  windowFlags = SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE;
  // renderFlags = SDL_RENDERER_PRESENTVSYNC|SDL_RENDERER_SOFTWARE;
#endif
  overscanCompX = width * 0.075;
  overscanCompY = height * 0.075;
  menuItemCount = (height - (overscanCompY * 2)) / FONT_TEX_SIZE;
  lowerHalf = menuItemCount / 2;
  upperHalf = ceil(menuItemCount / 2.0);
}

Renderer::~Renderer() {
  if (background != nullptr) {
    SDL_DestroyTexture(background);
  }
  if (renderer != nullptr) {
    SDL_DestroyRenderer(renderer);
  }
  if (window != nullptr) {
    SDL_DestroyWindow(window);
  }
}

int Renderer::init() {
  window = SDL_CreateWindow("NevolutionX", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
                            width, height, windowFlags);
  if (window == nullptr) {
    return 1;
  }
  renderer = SDL_CreateRenderer(window, -1, renderFlags);
  if (renderer == nullptr) {
    return 2;
  }
  SDL_SetRenderDrawBlendMode(getRenderer(), SDL_BLENDMODE_BLEND);
  setDrawColor();
  clear();
  return 0;
}

int Renderer::init(std::string const& backgroundImagePath) {
  int ret = init();
  if (ret != 0) {
    return ret;
  }
  SDL_Surface* bgsurf = IMG_Load(backgroundImagePath.c_str());
  if (bgsurf == nullptr) {
    InfoLog::outputLine(InfoLog::ERROR, "Creating background surface failed.\n");
    return 3;
  }
  background = SDL_CreateTextureFromSurface(renderer, bgsurf);
  SDL_FreeSurface(bgsurf);
  if (background == nullptr) {
    InfoLog::outputLine(InfoLog::ERROR, "Creating background texture failed.\n");
    return 4;
  }
  return ret;
}

int Renderer::clear() {
  int ret = SDL_RenderClear(renderer);
  return ret;
}

void Renderer::flip() {
  setDrawColor(0, 0, 0, 0xFF);
  SDL_RenderDrawRect(renderer, nullptr);
  setDrawColor();
  SDL_RenderPresent(renderer);
#ifdef NXDK
  XVideoWaitForVBlank();
#endif
}

int Renderer::setDrawColor(uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
  return SDL_SetRenderDrawColor(renderer, r, g, b, a);
}

void Renderer::drawTexture(SDL_Texture* tex, SDL_Rect& src, SDL_Rect& dst) {
  SDL_RenderCopy(renderer, tex, &src, &dst);
}

void Renderer::drawTexture(SDL_Texture* tex, SDL_Rect& dst) {
  SDL_RenderCopy(renderer, tex, nullptr, &dst);
}

void Renderer::drawTexture(SDL_Texture* tex, int x, int y) {
  SDL_Rect dst = { x, y, 0, 0 };
  SDL_QueryTexture(tex, nullptr, nullptr, &dst.w, &dst.h);
  drawTexture(tex, dst);
}

void Renderer::fillRectangle(const SDL_Rect& dst) {
  SDL_RenderFillRect(renderer, &dst);
}

void Renderer::fillRectangle(const SDL_FRect& dst) {
  SDL_RenderFillRectF(renderer, &dst);
}

void Renderer::blitSurface(SDL_Surface* bg, SDL_Surface* fg, int offset) {
  SDL_Rect dst = { offset, offset, fg->w, fg->h };
  SDL_SetSurfaceBlendMode(fg, SDL_BLENDMODE_BLEND);
  SDL_BlitSurface(fg, NULL, bg, &dst);
}

void Renderer::drawBackground() {
  if (background != nullptr) {
    drawTexture(background, 0, 0);
  }
}