commit c9a7313e2dee40dc47518e1c2a4d72960131c48d
parent b966b9b2bdd498d9c314510e5ac41ce2b098b283
Author: Brian Swetland <swetland@frotz.net>
Date: Sat, 26 Jan 2013 22:08:58 -0800
- Program convenience class and DebugText facility
Diffstat:
| A | DebugText.cc | | | 221 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | DebugText.h | | | 53 | +++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | Program.cc | | | 36 | ++++++++++++++++++++++++++++++++++++ |
| A | Program.h | | | 41 | +++++++++++++++++++++++++++++++++++++++++ |
4 files changed, 351 insertions(+), 0 deletions(-)
diff --git a/DebugText.cc b/DebugText.cc
@@ -0,0 +1,221 @@
+/* Copyright 2013 Brian Swetland <swetland@frotz.net>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "util.h"
+#include "glue.h"
+#include "matrix.h"
+
+#include "DebugText.h"
+
+struct DebugTextCell {
+ unsigned char x;
+ unsigned char y;
+ unsigned char z;
+ unsigned char w;
+ unsigned char u;
+ unsigned char v;
+ unsigned char i;
+ unsigned char j;
+};
+
+static void dtc_init(DebugTextCell *data, int w, int h) {
+ int x, y;
+ DebugTextCell *p = data;
+ memset(p, 0, sizeof(DebugTextCell) * w * h * 6);
+ y = 1;
+ for (y = h; y > 0; y--) {
+ for (x = 0; x < w; x++) {
+ p->x = x+0; p->y = y+0;
+ p->u = 0; p->v = 0; p->i = x; p->j = h-y; p++;
+ p->x = x+0; p->y = y-1;
+ p->u = 0; p->v = 1; p->i = x; p->j = h-y; p++;
+ p->x = x+1; p->y = y-1;
+ p->u = 1; p->v = 1; p->i = x; p->j = h-y; p++;
+ p->x = x+1; p->y = y-1;
+ p->u = 1; p->v = 1; p->i = x; p->j = h-y; p++;
+ p->x = x+1; p->y = y+0;
+ p->u = 1; p->v = 0; p->i = x; p->j = h-y; p++;
+ p->x = x+0; p->y = y+0;
+ p->u = 0; p->v = 0; p->i = x; p->j = h-y; p++;
+ }
+ }
+}
+
+int DebugText::init(unsigned w, unsigned h) {
+ cbw = w;
+ cbh = h;
+ cx = 0;
+ cy = 0;
+ dirty = 0;
+
+ data = (DebugTextCell*) malloc(sizeof(DebugTextCell) * w * h * 6);
+ cbdata = (unsigned char*) malloc(sizeof(unsigned char) * w * h);
+
+ dtc_init(data, 32, 32);
+
+ if (!(fontdata = load_png_rgba("font-vincent-8x8.png", &fdw, &fdh, 1)))
+ return -1;
+
+ if (pgm.compile("test2d.vs", "test2d.fs"))
+ return -1;
+
+ aVertex = pgm.getAttribID("aVertex");
+ aTexCoord = pgm.getAttribID("aTexCoord");
+ uMVP = pgm.getUniformID("uMVP");
+ uTex0 = pgm.getUniformID("uTexture0");
+ uTex1 = pgm.getUniformID("uTexture1");
+
+ glGenTextures(1, &tex0);
+ glGenTextures(1, &tex1);
+
+ glBindTexture(GL_TEXTURE_2D, tex0);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, fdw, fdh, 0, GL_RGBA,
+ GL_UNSIGNED_BYTE, fontdata);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+ memset(cbdata, 0, cbw * cbh);
+
+ glBindTexture(GL_TEXTURE_2D, tex1);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, cbw, cbh, 0, GL_ALPHA,
+ GL_UNSIGNED_BYTE, cbdata);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+ glGenBuffers(1, &vbo);
+ glBindBuffer(GL_ARRAY_BUFFER, vbo);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(DebugTextCell) * cbw * cbh * 6,
+ data, GL_STATIC_DRAW);
+
+ return 0;
+}
+
+int DebugText::render(void) {
+ mat4 MVP;
+ MVP.setOrtho(0.0, cbw, 0.0, cbh, 1.0, -1.0);
+
+ pgm.use();
+
+ glActiveTexture(GL_TEXTURE0);
+ glBindTexture(GL_TEXTURE_2D, tex0);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+ glActiveTexture(GL_TEXTURE1);
+ glBindTexture(GL_TEXTURE_2D, tex1);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+ if (dirty) {
+ dirty = 0;
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, cbw, cbh, 0, GL_ALPHA,
+ GL_UNSIGNED_BYTE, cbdata);
+ }
+
+ glUniformMatrix4fv(uMVP, 1, GL_FALSE, MVP);
+ glUniform1i(uTex0, 0);
+ glUniform1i(uTex1, 1);
+
+ glEnable(GL_BLEND);
+ glDisable(GL_DEPTH_TEST);
+
+ glBlendFunc(GL_SRC_COLOR, GL_ONE_MINUS_SRC_ALPHA);
+
+ glBindBuffer(GL_ARRAY_BUFFER, vbo);
+
+ glVertexAttribPointer(aVertex, 4, GL_UNSIGNED_BYTE, GL_FALSE, 8, (void*) 0);
+ glVertexAttribPointer(aTexCoord, 4, GL_UNSIGNED_BYTE, GL_FALSE, 8, (void*) 4);
+
+ glEnableVertexAttribArray(aVertex);
+ glEnableVertexAttribArray(aTexCoord);
+
+ glDrawArrays(GL_TRIANGLES, 0, cbw * cbh * 6);
+ return 0;
+}
+
+void DebugText::putch(unsigned c) {
+ switch (c) {
+ case 10:
+ cx = 0;
+ if (cy < cbh - 1)
+ cy++;
+ return;
+ case 13:
+ return;
+ case 9:
+ c = ' ';
+ break;
+ }
+ cbdata[cx + cy * cbw] = c;
+
+ if (++cx == cbw) {
+ cx = 0;
+ if (++cy == cbh) {
+ cy = cbh - 1;
+ }
+ }
+
+ dirty = 1;
+}
+
+void DebugText::puts(const char *s) {
+ while (*s)
+ putch(*s++);
+}
+
+void DebugText::clear(void) {
+ memset(cbdata, 0, cbw * cbh);
+ cx = 0;
+ cy = 0;
+ dirty = 1;
+}
+
+void DebugText::printf(const char *fmt, ...) {
+ va_list ap;
+ char tmp[128];
+
+ va_start(ap, fmt);
+ vsnprintf(tmp, sizeof(tmp), fmt, ap);
+ va_end(ap);
+
+ puts(tmp);
+}
+
+#if 0
+DebugText DT;
+
+int scene_init(struct ctxt *c) {
+ glViewport(0, 0, c->width, c->height);
+ glClearColor(0, 0, 180, 255);
+ glClearDepth(1.0f);
+ DT.init(32, 32);
+ return 0;
+}
+
+int fr = 0;
+
+int scene_draw(struct ctxt *c) {
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ DT.printf("Frame #%d\n", fr++);
+ DT.render();
+ return 0;
+}
+#endif
diff --git a/DebugText.h b/DebugText.h
@@ -0,0 +1,53 @@
+/* Copyright 2013 Brian Swetland <swetland@frotz.net>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _DEBUG_TEXT_H_
+#define _DEBUG_TEXT_H_
+
+#include "Program.h"
+
+struct DebugTextCell;
+
+class DebugText {
+private:
+ unsigned char *cbdata;
+ unsigned cbw, cbh;
+
+ void *fontdata;
+ unsigned fdw, fdh;
+
+ Program pgm;
+
+ struct DebugTextCell *data;
+
+ GLuint tex0, tex1, vbo;
+ GLuint aVertex, aTexCoord;
+ GLuint uMVP, uTex0, uTex1;
+
+ unsigned cx, cy;
+ unsigned dirty;
+
+public:
+ int init(unsigned w, unsigned h);
+ int render(void);
+
+ void clear(void);
+ void putch(unsigned c);
+ void puts(const char *s);
+ void printf(const char *fmt, ...);
+};
+
+#endif
+
diff --git a/Program.cc b/Program.cc
@@ -0,0 +1,36 @@
+/* Copyright 2013 Brian Swetland <swetland@frotz.net>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "glue.h"
+#include "util.h"
+#include "Program.h"
+
+Program::Program() : vsrc(NULL), fsrc(NULL), status(-1) {
+}
+
+int Program::compile(const char *vfn, const char *ffn) {
+ if (!(vsrc = (char*) load_file(vfn, 0)))
+ return -1;
+ if (!(fsrc = (char*) load_file(ffn, 0)))
+ return -1;
+ if (shader_compile(vsrc, fsrc, &pobj, &vobj, &fobj))
+ return -1;
+ status = 0;
+ return 0;
+}
+
diff --git a/Program.h b/Program.h
@@ -0,0 +1,41 @@
+/* Copyright 2013 Brian Swetland <swetland@frotz.net>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _PROGRAM_H_
+#define _PROGRAM_H_
+
+class Program {
+ GLuint pobj, vobj, fobj;
+ char *vsrc, *fsrc;
+ int status;
+
+public:
+ Program();
+
+ int compile(const char *vfn, const char *ffn);
+ int ready() { return status == 0; }
+
+ void use(void) {
+ glUseProgram(pobj);
+ }
+ unsigned getAttribID(const char *name) {
+ return glGetAttribLocation(pobj, name);
+ }
+ unsigned getUniformID(const char *name) {
+ return glGetUniformLocation(pobj, name);
+ }
+};
+
+#endif
