load and display bitmaps

src/assets.c++

@@ -0,0 +1,255 @@
+#include <cstdio>
+
+#include <unordered_map>
+#include <vector>
+#include <tuple>
+#include <string>
+
+#include "ass.h"
+#include "rect-pack.h"
+#include "batch.h"
+
+#include <glad/gles2.h>
+
+#include "main.h++"
+
+static int read_vlq(unsigned char const *buf, size_t size, size_t &out) {
+	size_t outsize = buf[0];
+	unsigned outsizebytes = 1;
+	for (unsigned m = 0x80; outsize & m; m = m >> 1) {
+		outsizebytes++;
+		outsize &= ~m;
+	}
+	if (outsizebytes > size) {
+		return -outsizebytes;
+	}
+	for (unsigned i = 1; i < outsizebytes; i++) {
+		outsize = (outsize << 8) | buf[i];
+	}
+	out = outsize;
+	return outsizebytes;
+}
+
+struct {
+	std::vector<std::string> filename;
+	std::vector<struct rect> rect;
+	std::vector<std::vector<unsigned char>> data;
+} pictures = {};
+
+static int decode_pic(struct rect const &r, std::vector<unsigned char> &data, unsigned char *out, size_t const xstride, size_t const ystride) {
+	if (data.size() != r.w * r.h) {
+		return 1;
+	}
+	for (size_t y = 0; y < r.h; y++) {
+		for (size_t x = 0; x < r.w; x++) {
+			out[y * ystride + x * xstride] = data[y * r.w + x];
+		}
+	}
+	return 0;
+}
+
+GLuint util_compileShader(char *name, GLsizei size, GLchar const **strings, GLint *lengths, GLenum shaderType) {
+	GLuint shader = glCreateShader(shaderType);
+	if (shader == 0) {
+		return 0;
+	}
+
+	glShaderSource(shader, size, strings, lengths);
+
+	glCompileShader(shader);
+
+	int success;
+	glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
+	if (success == false) {
+		char message[512];
+		glGetShaderInfoLog(shader, sizeof (message), NULL, message);
+		fprintf(stderr, "error: %s: %s\n", name, message);
+		glDeleteShader(shader);
+		return 0;
+	}
+
+	return shader;
+}
+
+GLuint util_linkProgram(char *name, GLuint Vshader, GLuint Fshader) {
+	GLuint program = glCreateProgram();
+	if (program == 0) {
+		return 0;
+	}
+
+	glAttachShader(program, Vshader);
+	glAttachShader(program, Fshader);
+
+	glLinkProgram(program);
+
+	int success;
+	glGetProgramiv(program, GL_LINK_STATUS, &success);
+	if (success == false) {
+		char message[512];
+		glGetProgramInfoLog(program, sizeof (message), NULL, message);
+		fprintf(stderr, "error: %s: %s\n", name, message);
+		glDeleteProgram(program);
+		return 0;
+	}
+
+	return program;
+}
+
+int assets_load(FILE *file, char const *name) {
+	enum ass_status ret = assread(file, [](char const *filename_, size_t length, void const *data_, size_t size, void *ctx) -> int {
+		(void) ctx;
+		std::string filename = std::string(filename_, length);
+		auto pos = filename.find_last_of('.');
+		std::string const name = filename.substr(0, pos);
+		std::string const extension = pos == filename.npos? "": filename.substr(pos);
+		unsigned char const *data = (unsigned char const *) data_;
+		if (extension == ".shader") {
+			char const *vsrc = (char const *) data;
+			size_t len = strnlen(vsrc, size);
+			if (len == size) {
+				return 1;
+			}
+			char const *fsrc = vsrc + len + 1;
+			len = size - len - 1;
+			if (strnlen(fsrc, len) != len - 1) {
+				return 1;
+			}
+			
+			GLuint vshader = glCreateShader(GL_VERTEX_SHADER);
+			glShaderSource(vshader, 1, &vsrc, NULL);
+			glCompileShader(vshader);
+			GLuint fshader = glCreateShader(GL_FRAGMENT_SHADER);
+			glShaderSource(fshader, 1, &fsrc, NULL);
+			glCompileShader(fshader);
+
+			int vsuccess, fsuccess;
+			glGetShaderiv(vshader, GL_COMPILE_STATUS, &vsuccess);
+			glGetShaderiv(fshader, GL_COMPILE_STATUS, &fsuccess);
+			if (vsuccess == false || fsuccess == false) {
+				char message[1024];
+				if (vsuccess == false) {
+					glGetShaderInfoLog(vshader, sizeof (message), NULL, message);
+					fprintf(stderr, "error: %s.vert: %s\n", name.c_str(), message);
+				}
+				if (fsuccess == false) {
+					glGetShaderInfoLog(fshader, sizeof (message), NULL, message);
+					fprintf(stderr, "error: %s.frag: %s\n", name.c_str(), message);
+				}
+			} else {
+				GLuint program = glCreateProgram();
+				glAttachShader(program, vshader);
+				glAttachShader(program, fshader);
+				glLinkProgram(program);
+
+				int success;
+				glGetProgramiv(program, GL_LINK_STATUS, &success);
+				if (success == false) {
+					char message[1024];
+					glGetProgramInfoLog(program, sizeof (message), NULL, message);
+					fprintf(stderr, "error: %s: %s\n", name.c_str(), message);
+					glDeleteProgram(program);
+				} else {
+					programs[name] = program;
+				}
+			}
+
+			glDeleteShader(vshader);
+			glDeleteShader(fshader);
+			return vsuccess == false || fsuccess == false;
+		} else if (extension == ".picture") {
+			if (memcmp(data, "\xdd\xddpic\n\0\0", 8)) {
+				return 1;
+			}
+			data += 8; size -= 8;
+			size_t value;
+			struct rect r = {};
+			int result = read_vlq(data, size, value);
+			r.w = value + 1;
+			if (result < 0 || r.w - 1 != value) {
+				return 1;
+			}
+			data += result; size -= result;
+			result = read_vlq(data, size, value);
+			r.h = value + 1;
+			if (result < 0 || r.h - 1 != value) {
+				return 1;
+			}
+			data += result; size -= result;
+			std::vector<unsigned char> v(data, data + size);
+			pictures.filename.push_back(name);
+			pictures.rect.push_back(r);
+			pictures.data.push_back(v);
+		} else {
+			return 1;
+		}
+		return 0;
+	}, NULL);
+	
+	if (ret != ASS_OK) {
+		switch (ret) {
+			case ASS_OK: break;
+			case ASS_BAD: fprintf(stderr, "error: %s: malformed asset pack\n", name); break;
+			case ASS_USER: fprintf(stderr, "error: %s: malformed asset\n", name); break;
+			case ASS_TRUNC: fprintf(stderr, "error: %s: truncated asset pack\n", name); break;
+			case ASS_LAZY: fprintf(stderr, "error: %s: this asset pack will not load, sorry\n", name); break;
+			case ASS_MEM: fprintf(stderr, "error: %s: memory exhausted while trying to load asset pack\n", name); break;
+			case ASS_UNSUPPORTED: fprintf(stderr, "error: %s: unsupported asset pack version\n", name); break;
+		}
+		return 1;
+	}
+
+	struct pack_result res = guilotine(pictures.rect.data(), pictures.rect.size(), 512, 1);
+	if (res.bins == 0) {
+		return 1;
+	}
+	
+	size_t const stride = res.last_bin_size;
+	unsigned char *tex = new unsigned char [stride * stride];
+	memset(tex, 69, stride * stride);
+	for (size_t i = 0; i < pictures.rect.size(); i++) {
+		struct rect const &r = pictures.rect[i];
+		//fprintf(stderr, "%s: %ux%u +%u+%u @ %u %c\n", pictures.filename[i].c_str(), r.w, r.h, r.x, r.y, r.bin, r.flipped? '+': '-');
+
+		int ret = decode_pic(r, pictures.data[i], tex + r.y * stride + r.x, r.flipped? stride: 1, r.flipped? 1: stride);
+		if (ret) {
+			delete[] tex;
+			return 1;
+		}
+	}
+	//fprintf(stderr, "info: %u %u %u %u\n", res.bins, res.last_bin_size, res.last_bin_width, res.last_bin_height);
+
+	GLuint texture;
+	glGenTextures(1, &texture);
+	glBindTexture(GL_TEXTURE_2D, texture);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, stride, stride, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, tex);
+	delete[] tex;
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+	#if 1
+	unsigned tsize = 65536 / stride;
+	#else
+	unsigned tsize = 0;
+	for (unsigned s = stride; s & 0xffff; s <<= 1, tsize++)
+		;
+	#endif
+	
+	for (size_t i = 0; i < pictures.rect.size(); i++) {
+		struct rect const &r = pictures.rect[i];
+		struct texture t = {.texture = texture, .x = r.x, .y = r.y, .size = tsize, .flipped = r.flipped};
+		textures[pictures.filename[i]] = t;
+	}
+
+	pictures.rect.clear();
+	pictures.rect.shrink_to_fit();
+	pictures.data.clear();
+	pictures.data.shrink_to_fit();
+	pictures.filename.clear();
+	pictures.filename.shrink_to_fit();
+
+	return 0;
+}

src/assets.h++

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <cstdio>
+
+int assets_load(FILE *file, char const *name);

src/main.c++

@@ -9,39 +9,22 @@
 #include <cstdio>
 #include <ctime>
 
-#include "ass.h"
+#include "batch.h"
+#include "assets.h++"
+#include "main.h++"
 
 #define WINDOW_WIDTH  128
 #define WINDOW_HEIGHT 128
 
-#if 0
+#define BATCH_SIZE 1024
-// something something string_view faster but actually cryptic error messages so w/e future me problem
-#include <string_view>
-struct string_hash {
-	using is_transparent = void;
-	[[nodiscard]] size_t operator()(const char *txt) const {
-		return std::hash<std::string_view>{}(txt);
-	}
-	[[nodiscard]] size_t operator()(std::string_view txt) const {
-		return std::hash<std::string_view>{}(txt);
-	}
-	[[nodiscard]] size_t operator()(const std::string &txt) const {
-		return std::hash<std::string>{}(txt);
-	}
-};
-	std::unordered_map<std::string, unsigned, string_hash, std::equal_to<>> programs, textures;
-#endif
 
-struct state {
 SDL_Window *window;
 SDL_GLContext context;
-	float color;
+std::unordered_map<std::string, unsigned> programs;
-	std::unordered_map<std::string, unsigned> programs, textures;
+std::unordered_map<std::string, struct texture> textures;
-};
 
-SDL_AppResult SDL_AppInit(void **appstate, int argc, char **argv) {
+SDL_AppResult SDL_AppInit(void **, int argc, char **argv) {
 	clock_t begin = clock();
-	auto state = new (struct state);
 	
 	SDL_Init(SDL_INIT_VIDEO);
 	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
@@ -50,10 +33,10 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char **argv) {
 	SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
 	SDL_SetHint(SDL_HINT_MAIN_CALLBACK_RATE, "60");
 
-	state->window = SDL_CreateWindow("suwi", WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_HIDDEN | SDL_WINDOW_OPENGL /*| SDL_WINDOW_RESIZABLE*/ | SDL_WINDOW_TRANSPARENT);
+	window = SDL_CreateWindow("suwi", WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_HIDDEN | SDL_WINDOW_OPENGL /*| SDL_WINDOW_RESIZABLE*/ | SDL_WINDOW_TRANSPARENT);
-	SDL_SetWindowMinimumSize(state->window, WINDOW_WIDTH, WINDOW_HEIGHT);
+	SDL_SetWindowMinimumSize(window, WINDOW_WIDTH, WINDOW_HEIGHT);
 
-	state->context = SDL_GL_CreateContext(state->window);
+	context = SDL_GL_CreateContext(window);
 	
 	int version = gladLoadGLES2((GLADloadfunc) SDL_GL_GetProcAddress);
 	if (version == 0) {
@@ -75,35 +58,28 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char **argv) {
 			perror(path.c_str());
 			return SDL_APP_FAILURE;
 		}
+		if (assets_load(file, path.c_str())) {
+			return SDL_APP_FAILURE;
+		}
 	} else {
 		file = fopen(argv[1], "rb");
 		if (file == NULL) {
 			perror(argv[1]);
 			return SDL_APP_FAILURE;
 		}
-	}
+		if (assets_load(file, argv[1])) {
-	if (assread(file, [](char const *name, size_t length, void const *data, size_t size, /* struct state *state */ void *ctx) -> int {
-		auto &state = *(struct state *) ctx;
-		std::string filename = std::string(name, length);
-		(void) name;
-		(void) length;
-		(void) data;
-		(void) size;
-		if (filename.ends_with(".glsl")) {
-			state.programs[filename];
-		}
-		state.textures[filename];
-		return 0;
-	}, state)) {
 			return SDL_APP_FAILURE;
 		}
+	}
+	fclose(file);
+
+	batch_init(BATCH_SIZE, programs.at("spr2D"));
 
 	glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);
-	SDL_ShowWindow(state->window);
+	SDL_ShowWindow(window);
 	
 	fprintf(stderr, "info: init took %lu ms\n", ((clock() - begin) * 1000) / CLOCKS_PER_SEC);
 	
-	*appstate = state;
 	return SDL_APP_CONTINUE;
 }
 
@@ -146,12 +122,15 @@ SDL_AppResult SDL_AppEvent(void *, SDL_Event *evt) {
 	return SDL_APP_CONTINUE;
 }
 
-SDL_AppResult SDL_AppIterate(void *appstate) {
+SDL_AppResult SDL_AppIterate(void *) {
-	auto &state = *(struct state *) appstate;
 	glClearColor(0.5, 0.5, 0.5, 0.0);
 	glClear(GL_COLOR_BUFFER_BIT);
 
-	SDL_GL_SwapWindow(state.window);
+	struct crop c = {0, 0, 64, 64};
+	batch_blit(-32, -32, &textures.at("turret"), &c);
+	batch_flush();
+	
+	SDL_GL_SwapWindow(window);
 	return SDL_APP_CONTINUE;
 }
 

src/main.h++

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <glad/gles2.h>
+#include <SDL3/SDL.h>
+
+#include <unordered_map>
+#include <string>
+
+#include "batch.h"
+
+#if 0
+// something something string_view faster but actually cryptic error messages so w/e future me problem
+#include <string_view>
+struct string_hash {
+	using is_transparent = void;
+	[[nodiscard]] size_t operator()(const char *txt) const {
+		return std::hash<std::string_view>{}(txt);
+	}
+	[[nodiscard]] size_t operator()(std::string_view txt) const {
+		return std::hash<std::string_view>{}(txt);
+	}
+	[[nodiscard]] size_t operator()(const std::string &txt) const {
+		return std::hash<std::string>{}(txt);
+	}
+};
+	std::unordered_map<std::string, unsigned, string_hash, std::equal_to<>> programs, textures;
+#endif
+
+extern SDL_Window *window;
+extern SDL_GLContext context;
+extern std::unordered_map<std::string, unsigned> programs;
+extern std::unordered_map<std::string, struct texture> textures;

src/rect-pack.c

@@ -95,7 +95,7 @@ struct pack_result guilotine(struct rect *rects, size_t items, unsigned maxsize,
 }
 
 static struct pack_result guilotine_(struct rect **left_base, size_t left_count, unsigned maxwidth, unsigned maxheight, unsigned bins, unsigned maxbins) {
-	fprintf(stderr, "%zu %ux%u, %u\n", left_count, maxwidth, maxheight, maxbins - bins);
+	//fprintf(stderr, "%zu %ux%u, %u\n", left_count, maxwidth, maxheight, maxbins - bins);
 	struct rect **left = left_base;
 	unsigned in_last_bin = 0;
 	size_t slot_count = 1;
@@ -233,28 +233,8 @@ static struct pack_result guilotine_(struct rect **left_base, size_t left_count,
 	//free(other_left);
 	free(tighter);
 	
-	#if 0
-	fprintf(stdout, "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 %u %u\">", (maxsize + 16) * bins - 16, maxsize);
-	for (unsigned i = 0; i < bins; i++) {
-		unsigned binx = (maxsize + 16) * i, biny = 0;
-		fprintf(stdout, "<view id=\"%u\" viewBox=\"%u %u %u %u\"/>", i, binx, biny, maxsize, maxsize);
-	}
-	fputs("<style>rect{stroke:black;}.bg{fill:gray;}.flipped{fill:green;}.normal{fill:blue}text{font-family:monospace;text-anchor:middle;alignment-baseline:central;}</style>", stdout);
-	for (unsigned i = 0; i < items; i++) {
-		unsigned w = rects[i].flipped? rects[i].h: rects[i].w;
-		unsigned h = rects[i].flipped? rects[i].w: rects[i].h;
-		unsigned binx = (maxsize + 16) * rects[i].bin, biny = 0;
-		fprintf(stdout, "<rect x=\"%u.5\" y=\"%u.5\" width=\"%u\" height=\"%u\" class=\"%s\"/><text x=\"%u\" y=\"%u\" style=\"font-size: %upx\">%u</text>", rects[i].x + binx, rects[i].y + biny, w - 1, h - 1, rects[i].flipped? "flipped": "normal", rects[i].x + w / 2 + binx, rects[i].y + h / 2 + biny, h > 20? 20: h, i);
-	}
-	for (unsigned i = 0; i < slot_count; i++) {
-		unsigned binx = (maxsize + 16) * slots[i].bin, biny = 0;
-		fprintf(stdout, "<rect x=\"%u.5\" y=\"%u.5\" width=\"%u\" height=\"%u\" class=\"bg\"/>", slots[i].x + binx, slots[i].y + biny, slots[i].w - 1, slots[i].h - 1);
-	}
-	fputs("</svg>", stdout);
-	#endif
-	
 	free(left_base);
 	free(slots);
-	fprintf(stderr, "%u %u %u %u\n", bins, last_bin.last_bin_size, last_bin.last_bin_width, last_bin.last_bin_height);
+	//fprintf(stderr, "%u %u %u %u\n", bins, last_bin.last_bin_size, last_bin.last_bin_width, last_bin.last_bin_height);
 	return (struct pack_result) {bins, last_bin.last_bin_size, last_bin.last_bin_width, last_bin.last_bin_height};
 }

src/spr2D.glsl

@@ -15,7 +15,7 @@ attribute vec2 aTexCoord;
 
 void main(void) {
 	vTexCoord = aTexCoord;
-	gl_Position = vec4(aVertCoord * vec2(1.0 / 256.0), 0.0, 1.0);
+	gl_Position = vec4(aVertCoord * vec2(1.0 / 64.0), 0.0, 1.0);
 }
 
 ##
@@ -23,8 +23,9 @@ void main(void) {
 uniform sampler2D uTex;
 
 void main(void) {
-	if (texture2D(uTex, vTexCoord).r < 0.5) {
+	float pixel = texture2D(uTex, vTexCoord).r;
+	if (pixel < 0.5) {
 		discard;
 	}
-	gl_FragColor = vec4(1.0);
+	gl_FragColor = step(vec4(0.75, 0.75, 0.75, 0.5), vec4(pixel));
 }