#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include "SDL_test_common.h"

Include dependency graph for testdraw2.c:

Macros
#define	NUM_OBJECTS 100

Functions
void	DrawPoints (SDL_Renderer *renderer)
void	DrawLines (SDL_Renderer *renderer)
void	DrawRects (SDL_Renderer *renderer)
void	loop ()
int	main (int argc, char *argv[])

Variables
static SDLTest_CommonState *	state
static int	num_objects
static SDL_bool	cycle_color
static SDL_bool	cycle_alpha
static int	cycle_direction = 1
static int	current_alpha = 255
static int	current_color = 255
static SDL_BlendMode	blendMode = SDL_BLENDMODE_NONE
int	done

Macro Definition Documentation

#define NUM_OBJECTS 100

Definition at line 25 of file testdraw2.c.

Referenced by main().

Function Documentation

void DrawLines ( SDL_Renderer * renderer )

Definition at line 82 of file testdraw2.c.

References current_alpha, current_color, cycle_alpha, cycle_color, cycle_direction, SDL_Rect::h, i, num_objects, SDL_RenderDrawLine, SDL_RenderGetViewport, SDL_SetRenderDrawColor, viewport, and SDL_Rect::w.

Referenced by loop().

{
    int i;
    int x1, y1, x2, y2;
    SDL_Rect viewport;
    /* Query the sizes */
    SDL_RenderGetViewport(renderer, &viewport);
    for (i = 0; i < num_objects; ++i) {
        /* Cycle the color and alpha, if desired */
        if (cycle_color) {
            current_color += cycle_direction;
            if (current_color < 0) {
                current_color = 0;
                cycle_direction = -cycle_direction;
            }
            if (current_color > 255) {
                current_color = 255;
                cycle_direction = -cycle_direction;
            }
        }
        if (cycle_alpha) {
            current_alpha += cycle_direction;
            if (current_alpha < 0) {
                current_alpha = 0;
                cycle_direction = -cycle_direction;
            }
            if (current_alpha > 255) {
                current_alpha = 255;
                cycle_direction = -cycle_direction;
            }
        }
        SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color,
                               (Uint8) current_color, (Uint8) current_alpha);
        if (i == 0) {
            SDL_RenderDrawLine(renderer, 0, 0, viewport.w - 1, viewport.h - 1);
            SDL_RenderDrawLine(renderer, 0, viewport.h - 1, viewport.w - 1, 0);
            SDL_RenderDrawLine(renderer, 0, viewport.h / 2, viewport.w - 1, viewport.h / 2);
            SDL_RenderDrawLine(renderer, viewport.w / 2, 0, viewport.w / 2, viewport.h - 1);
        } else {
            x1 = (rand() % (viewport.w*2)) - viewport.w;
            x2 = (rand() % (viewport.w*2)) - viewport.w;
            y1 = (rand() % (viewport.h*2)) - viewport.h;
            y2 = (rand() % (viewport.h*2)) - viewport.h;
            SDL_RenderDrawLine(renderer, x1, y1, x2, y2);
        }
    }
}

void DrawPoints ( SDL_Renderer * renderer )

Definition at line 39 of file testdraw2.c.

References current_alpha, current_color, cycle_alpha, cycle_color, cycle_direction, SDL_Rect::h, i, num_objects, SDL_RenderDrawPoint, SDL_RenderGetViewport, SDL_SetRenderDrawColor, viewport, and SDL_Rect::w.

Referenced by loop().

{
    int i;
    int x, y;
    SDL_Rect viewport;
    /* Query the sizes */
    SDL_RenderGetViewport(renderer, &viewport);
    for (i = 0; i < num_objects * 4; ++i) {
        /* Cycle the color and alpha, if desired */
        if (cycle_color) {
            current_color += cycle_direction;
            if (current_color < 0) {
                current_color = 0;
                cycle_direction = -cycle_direction;
            }
            if (current_color > 255) {
                current_color = 255;
                cycle_direction = -cycle_direction;
            }
        }
        if (cycle_alpha) {
            current_alpha += cycle_direction;
            if (current_alpha < 0) {
                current_alpha = 0;
                cycle_direction = -cycle_direction;
            }
            if (current_alpha > 255) {
                current_alpha = 255;
                cycle_direction = -cycle_direction;
            }
        }
        SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color,
                               (Uint8) current_color, (Uint8) current_alpha);
        x = rand() % viewport.w;
        y = rand() % viewport.h;
        SDL_RenderDrawPoint(renderer, x, y);
    }
}

void DrawRects ( SDL_Renderer * renderer )

Definition at line 134 of file testdraw2.c.

References current_alpha, current_color, cycle_alpha, cycle_color, cycle_direction, SDL_Rect::h, i, num_objects, rect, SDL_RenderFillRect, SDL_RenderGetViewport, SDL_SetRenderDrawColor, viewport, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by loop().

{
    int i;
    SDL_Rect rect;
    SDL_Rect viewport;
    /* Query the sizes */
    SDL_RenderGetViewport(renderer, &viewport);
    for (i = 0; i < num_objects / 4; ++i) {
        /* Cycle the color and alpha, if desired */
        if (cycle_color) {
            current_color += cycle_direction;
            if (current_color < 0) {
                current_color = 0;
                cycle_direction = -cycle_direction;
            }
            if (current_color > 255) {
                current_color = 255;
                cycle_direction = -cycle_direction;
            }
        }
        if (cycle_alpha) {
            current_alpha += cycle_direction;
            if (current_alpha < 0) {
                current_alpha = 0;
                cycle_direction = -cycle_direction;
            }
            if (current_alpha > 255) {
                current_alpha = 255;
                cycle_direction = -cycle_direction;
            }
        }
        SDL_SetRenderDrawColor(renderer, 255, (Uint8) current_color,
                               (Uint8) current_color, (Uint8) current_alpha);
        rect.w = rand() % (viewport.h / 2);
        rect.h = rand() % (viewport.h / 2);
        rect.x = (rand() % (viewport.w*2) - viewport.w) - (rect.w / 2);
        rect.y = (rand() % (viewport.h*2) - viewport.h) - (rect.h / 2);
        SDL_RenderFillRect(renderer, &rect);
    }
}

void loop ( )

Definition at line 179 of file testdraw2.c.

References done, DrawLines(), DrawPoints(), DrawRects(), i, NULL, SDLTest_CommonState::num_windows, renderer, SDLTest_CommonState::renderers, SDL_PollEvent, SDL_RenderClear, SDL_RenderPresent, SDL_SetRenderDrawColor, SDLTest_CommonEvent(), and SDLTest_CommonState::windows.

{
    int i;
    SDL_Event event;
    /* Check for events */
    while (SDL_PollEvent(&event)) {
        SDLTest_CommonEvent(state, &event, &done);
    }
    for (i = 0; i < state->num_windows; ++i) {
        SDL_Renderer *renderer = state->renderers[i];
        if (state->windows[i] == NULL)
            continue;
        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
        SDL_RenderClear(renderer);
        DrawRects(renderer);
        DrawLines(renderer);
        DrawPoints(renderer);
        SDL_RenderPresent(renderer);
    }
#ifdef __EMSCRIPTEN__
    if (done) {
        emscripten_cancel_main_loop();
    }
#endif
}

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 209 of file testdraw2.c.

References blendMode, cycle_alpha, cycle_color, done, i, loop(), NULL, NUM_OBJECTS, num_objects, SDLTest_CommonState::num_windows, renderer, SDLTest_CommonState::renderers, SDL_atoi, SDL_BLENDMODE_ADD, SDL_BLENDMODE_BLEND, SDL_BLENDMODE_MOD, SDL_BLENDMODE_NONE, SDL_GetTicks(), SDL_INIT_VIDEO, SDL_isdigit, SDL_Log, SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, SDL_LogSetPriority, SDL_RenderClear, SDL_SetRenderDrawBlendMode, SDL_SetRenderDrawColor, SDL_strcasecmp, SDL_TRUE, SDLTest_CommonArg(), SDLTest_CommonCreateState(), SDLTest_CommonInit(), SDLTest_CommonQuit(), and SDLTest_CommonUsage().

{
    int i;
    Uint32 then, now, frames;
    /* Enable standard application logging */
    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
    /* Initialize parameters */
    num_objects = NUM_OBJECTS;
    /* Initialize test framework */
    state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
    if (!state) {
        return 1;
    }
    for (i = 1; i < argc;) {
        int consumed;
        consumed = SDLTest_CommonArg(state, i);
        if (consumed == 0) {
            consumed = -1;
            if (SDL_strcasecmp(argv[i], "--blend") == 0) {
                if (argv[i + 1]) {
                    if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
                        blendMode = SDL_BLENDMODE_NONE;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
                        blendMode = SDL_BLENDMODE_BLEND;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
                        blendMode = SDL_BLENDMODE_ADD;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
                        blendMode = SDL_BLENDMODE_MOD;
                        consumed = 2;
                    }
                }
            } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
                cycle_color = SDL_TRUE;
                consumed = 1;
            } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
                cycle_alpha = SDL_TRUE;
                consumed = 1;
            } else if (SDL_isdigit(*argv[i])) {
                num_objects = SDL_atoi(argv[i]);
                consumed = 1;
            }
        }
        if (consumed < 0) {
            SDL_Log("Usage: %s %s [--blend none|blend|add|mod] [--cyclecolor] [--cyclealpha]\n",
                    argv[0], SDLTest_CommonUsage(state));
            return 1;
        }
        i += consumed;
    }
    if (!SDLTest_CommonInit(state)) {
        return 2;
    }
    /* Create the windows and initialize the renderers */
    for (i = 0; i < state->num_windows; ++i) {
        SDL_Renderer *renderer = state->renderers[i];
        SDL_SetRenderDrawBlendMode(renderer, blendMode);
        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
        SDL_RenderClear(renderer);
    }
    srand((unsigned int)time(NULL));
    /* Main render loop */
    frames = 0;
    then = SDL_GetTicks();
    done = 0;
#ifdef __EMSCRIPTEN__
    emscripten_set_main_loop(loop, 0, 1);
#else
    while (!done) {
        ++frames;
        loop();
        }
#endif
    SDLTest_CommonQuit(state);
    /* Print out some timing information */
    now = SDL_GetTicks();
    if (now > then) {
        double fps = ((double) frames * 1000) / (now - then);
        SDL_Log("%2.2f frames per second\n", fps);
    }
    return 0;
}