diff options
Diffstat (limited to 'examples/pugl_shader_demo.c')
| -rw-r--r-- | examples/pugl_shader_demo.c | 47 |
1 files changed, 40 insertions, 7 deletions
diff --git a/examples/pugl_shader_demo.c b/examples/pugl_shader_demo.c index 178278b..9ba3da0 100644 --- a/examples/pugl_shader_demo.c +++ b/examples/pugl_shader_demo.c @@ -1,4 +1,4 @@ -// Copyright 2012-2020 David Robillard <d@drobilla.net> +// Copyright 2012-2023 David Robillard <d@drobilla.net> // SPDX-License-Identifier: ISC /* @@ -62,6 +62,8 @@ typedef struct { GLuint ibo; double lastDrawDuration; double lastFrameEndTime; + double mouseX; + double mouseY; unsigned framesDrawn; int quit; } PuglTestApp; @@ -103,17 +105,44 @@ onExpose(PuglView* view) glUseProgram(app->drawRect.program); glBindVertexArray(app->vao); + // Update horizontal mouse cursor line (last rect) + Rect* const mouseH = &app->rects[app->numRects]; + mouseH->pos[0] = (float)(app->mouseX - 8.0); + mouseH->pos[1] = (float)(frame.height - app->mouseY - 1.0); + mouseH->size[0] = 16.0f; + mouseH->size[1] = 2.0f; + mouseH->fillColor[0] = 1.0f; + mouseH->fillColor[1] = 1.0f; + mouseH->fillColor[2] = 1.0f; + mouseH->fillColor[3] = 0.5f; + + // Update vertical mouse cursor line (second last rect) + Rect* const mouseV = &app->rects[app->numRects + 1]; + mouseV->pos[0] = (float)(app->mouseX - 2.0); + mouseV->pos[1] = (float)(frame.height - app->mouseY - 8.0); + mouseV->size[0] = 2.0f; + mouseV->size[1] = 16.0f; + mouseV->fillColor[0] = 1.0f; + mouseV->fillColor[1] = 1.0f; + mouseV->fillColor[2] = 1.0f; + mouseV->fillColor[3] = 0.5f; + for (size_t i = 0; i < app->numRects; ++i) { moveRect(&app->rects[i], i, app->numRects, width, height, time); } glBufferData(GL_UNIFORM_BUFFER, sizeof(proj), &proj, GL_STREAM_DRAW); - glBufferSubData( - GL_ARRAY_BUFFER, 0, (GLsizeiptr)(app->numRects * sizeof(Rect)), app->rects); + glBufferSubData(GL_ARRAY_BUFFER, + 0, + (GLsizeiptr)((app->numRects + 2) * sizeof(Rect)), + app->rects); - glDrawElementsInstanced( - GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_INT, NULL, (GLsizei)(app->numRects * 4)); + glDrawElementsInstanced(GL_TRIANGLE_STRIP, + 4, + GL_UNSIGNED_INT, + NULL, + (GLsizei)((app->numRects + 2) * 4)); ++app->framesDrawn; @@ -160,6 +189,10 @@ onEvent(PuglView* view, const PuglEvent* event) app->quit = 1; } break; + case PUGL_MOTION: + app->mouseX = event->motion.x; + app->mouseY = event->motion.y; + break; case PUGL_TIMER: if (event->timer.id == resizeTimerId) { puglPostRedisplay(view); @@ -242,7 +275,7 @@ setupPugl(PuglTestApp* app) // Create world, view, and rect data app->world = puglNewWorld(PUGL_PROGRAM, 0); app->view = puglNewView(app->world); - app->rects = makeRects(app->numRects); + app->rects = makeRects(app->numRects + 2); // Set up world and view puglSetWorldString(app->world, PUGL_CLASS_NAME, "PuglShaderDemo"); @@ -360,7 +393,7 @@ setupGl(PuglTestApp* app) glGenBuffers(1, &app->instanceVbo); glBindBuffer(GL_ARRAY_BUFFER, app->instanceVbo); glBufferData(GL_ARRAY_BUFFER, - (GLsizeiptr)(app->numRects * sizeof(Rect)), + (GLsizeiptr)((app->numRects + 2) * sizeof(Rect)), app->rects, GL_STREAM_DRAW); |