aboutsummaryrefslogtreecommitdiff
path: root/example/example_gles3.c
diff options
context:
space:
mode:
Diffstat (limited to 'example/example_gles3.c')
-rw-r--r--example/example_gles3.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/example/example_gles3.c b/example/example_gles3.c
new file mode 100644
index 0000000..4a6084c
--- /dev/null
+++ b/example/example_gles3.c
@@ -0,0 +1,155 @@
+//
+// Copyright (c) 2013 Mikko Mononen memon@inside.org
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+// 1. The origin of this software must not be misrepresented; you must not
+// claim that you wrote the original software. If you use this software
+// in a product, an acknowledgment in the product documentation would be
+// appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+// misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+
+#include <stdio.h>
+#define GLFW_INCLUDE_ES3
+#define GLFW_INCLUDE_GLEXT
+#include <GLFW/glfw3.h>
+#include "nanovg.h"
+#define NANOVG_GLES3_IMPLEMENTATION
+#include "nanovg_gl.h"
+#include "nanovg_gl_utils.h"
+#include "demo.h"
+#include "perf.h"
+
+
+void errorcb(int error, const char* desc)
+{
+ printf("GLFW error %d: %s\n", error, desc);
+}
+
+int blowup = 0;
+int screenshot = 0;
+int premult = 0;
+
+static void key(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+ NVG_NOTUSED(scancode);
+ NVG_NOTUSED(mods);
+ if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+ glfwSetWindowShouldClose(window, GL_TRUE);
+ if (key == GLFW_KEY_SPACE && action == GLFW_PRESS)
+ blowup = !blowup;
+ if (key == GLFW_KEY_S && action == GLFW_PRESS)
+ screenshot = 1;
+ if (key == GLFW_KEY_P && action == GLFW_PRESS)
+ premult = !premult;
+}
+
+int main()
+{
+ GLFWwindow* window;
+ DemoData data;
+ NVGcontext* vg = NULL;
+ PerfGraph fps;
+ double prevt = 0;
+
+ if (!glfwInit()) {
+ printf("Failed to init GLFW.");
+ return -1;
+ }
+
+ initGraph(&fps, GRAPH_RENDER_FPS, "Frame Time");
+
+ glfwSetErrorCallback(errorcb);
+
+ glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
+ glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+ glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
+
+ window = glfwCreateWindow(1000, 600, "NanoVG", NULL, NULL);
+// window = glfwCreateWindow(1000, 600, "NanoVG", glfwGetPrimaryMonitor(), NULL);
+ if (!window) {
+ glfwTerminate();
+ return -1;
+ }
+
+ glfwSetKeyCallback(window, key);
+
+ glfwMakeContextCurrent(window);
+
+ vg = nvgCreateGLES3(NVG_ANTIALIAS | NVG_STENCIL_STROKES | NVG_DEBUG);
+ if (vg == NULL) {
+ printf("Could not init nanovg.\n");
+ return -1;
+ }
+
+ if (loadDemoData(vg, &data) == -1)
+ return -1;
+
+ glfwSwapInterval(0);
+
+ glfwSetTime(0);
+ prevt = glfwGetTime();
+
+ while (!glfwWindowShouldClose(window))
+ {
+ double mx, my, t, dt;
+ int winWidth, winHeight;
+ int fbWidth, fbHeight;
+ float pxRatio;
+
+ t = glfwGetTime();
+ dt = t - prevt;
+ prevt = t;
+ updateGraph(&fps, dt);
+
+ glfwGetCursorPos(window, &mx, &my);
+ glfwGetWindowSize(window, &winWidth, &winHeight);
+ glfwGetFramebufferSize(window, &fbWidth, &fbHeight);
+ // Calculate pixel ration for hi-dpi devices.
+ pxRatio = (float)fbWidth / (float)winWidth;
+
+ // Update and render
+ glViewport(0, 0, fbWidth, fbHeight);
+ if (premult)
+ glClearColor(0,0,0,0);
+ else
+ glClearColor(0.3f, 0.3f, 0.32f, 1.0f);
+ glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
+
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glEnable(GL_CULL_FACE);
+ glDisable(GL_DEPTH_TEST);
+
+ nvgBeginFrame(vg, winWidth, winHeight, pxRatio);
+
+ renderDemo(vg, mx,my, winWidth,winHeight, t, blowup, &data);
+ renderGraph(vg, 5,5, &fps);
+
+ nvgEndFrame(vg);
+
+ glEnable(GL_DEPTH_TEST);
+
+ if (screenshot) {
+ screenshot = 0;
+ saveScreenShot(fbWidth, fbHeight, premult, "dump.png");
+ }
+
+ glfwSwapBuffers(window);
+ glfwPollEvents();
+ }
+
+ freeDemoData(vg, &data);
+
+ nvgDeleteGLES3(vg);
+
+ glfwTerminate();
+ return 0;
+}