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217 | /* GATE PROJECT LICENSE:
+----------------------------------------------------------------------------+
| Copyright (c) 2018-2026, Stefan Meislinger <sm@opengate.at> |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met:|
| |
| 1. Redistributions of source code must retain the above copyright notice, |
| this list of conditions and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"|
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| THE POSSIBILITY OF SUCH DAMAGE. |
+----------------------------------------------------------------------------+
*/
#include "triangles.hpp"
#include "gate/graphics/gl_apis.hpp"
#include "gate/mathematics.hpp"
#include "gate/graphics/pixmapimages.hpp"
#include "gate/debugging.h"
namespace gate
{
namespace apps
{
TrianglesGame::TrianglesGame()
: ptrHost(NULL),
resetRequired(false),
shader_program(-1),
vbo_pos(0),
shader_loc_pos(-1)
{
}
TrianglesGame::~TrianglesGame() noexcept
{
}
void TrianglesGame::init(GameHost& host)
{
this->ptrHost = &host;
this->resetRequired = true;
}
#if defined(GATE_GRAPHICS_OPENGL2_SUPPORT)
static intptr_t create_shader_program(GlApi& gl)
{
static char const* const vertex_shader_src =
"attribute vec2 aPos;"
"void main() {"
" gl_Position = vec4(aPos, 0.0, 1.0);"
"}";
static char const * const fragment_shader_src =
"precision mediump float;"
"void main() {"
" gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);"
"}";
gate_intptr_t success = 0;
uintptr_t vertex_shader = gl.createShader(gate_gl2_api_shader_type_vertex);
gl.shaderSource(vertex_shader, 1, &vertex_shader_src, NULL);
gl.compileShader(vertex_shader);
gl.getShaderIv(vertex_shader, gate_gl2_api_shader_param_compile_status, &success);
if (!success)
{
char infoLog[1024];
gate_size_t infoLoglength = sizeof(infoLog) - 1;
gl.getShaderInfoLog(vertex_shader, infoLoglength, infoLoglength, infoLog);
infoLog[infoLoglength] = 0;
raiseException(results::Failed, infoLog, "glCompileShader(vertex)");
}
uintptr_t fragment_shader = gl.createShader(gate_gl2_api_shader_type_fragment);
gl.shaderSource(fragment_shader, 1, &fragment_shader_src, NULL);
gl.compileShader(fragment_shader);
gl.getShaderIv(fragment_shader, gate_gl2_api_shader_param_compile_status, &success);
if (!success)
{
char infoLog[1024];
gate_size_t infoLoglength = sizeof(infoLog) - 1;
gl.getShaderInfoLog(fragment_shader, infoLoglength, infoLoglength, infoLog);
infoLog[infoLoglength] = 0;
raiseException(results::Failed, infoLog, "glCompileShader(fragment)");
}
uintptr_t program = gl.createProgram();
gl.attachShader(program, vertex_shader);
gl.attachShader(program, fragment_shader);
gl.linkProgram(program);
gl.getProgramIv(program,gate_gl2_api_program_param_link_status, &success);
if (!success)
{
char infoLog[1024];
gate_size_t infoLoglength = sizeof(infoLog) - 1;
gl.getProgramInfoLog(program, infoLoglength, &infoLoglength, infoLog);
infoLog[infoLoglength] = 0;
raiseException(results::Failed, infoLog, "glLinkProgram()");
}
return program;
}
#endif /* GATE_GRAPHICS_OPENGL2_SUPPORT */
void TrianglesGame::loadModule(GlSurface& surface)
{
GlApi& gl = surface.getGlApi();<--- Variable 'gl' is assigned a value that is never used.
}
void TrianglesGame::unloadModule(GlSurface& surface)
{
GlApi& gl = surface.getGlApi();<--- Variable 'gl' is assigned a value that is never used.
/* TODO */
}
void TrianglesGame::resetSurface(GlSurface& surface)
{
GlApi& gl = surface.getGlApi();<--- Variable 'gl' is assigned a value that is never used.
uint32_t width = 800;
uint32_t height = 600;
surface.getSize(width, height);
GATE_DEBUG_TRACE_VALUE(width);
GATE_DEBUG_TRACE_VALUE(height);
#if defined(GATE_GRAPHICS_OPENGL2_SUPPORT)
gl.setViewport(0, 0, width, height);
if(this->shader_program != ((gate::uintptr_t)-1))
{
gl.disableVertexAttribArray(this->shader_loc_pos);
gl.deleteBuffers(1, &this->vbo_pos);
gl.deleteProgram(this->shader_program);
}
this->shader_program = create_shader_program(gl);
gl.useProgram(this->shader_program);
static float vertex_array[] = {
0.0f, 0.5f,
-0.5f, -0.5f,
0.5f, -0.5f
};
gl.genBuffers(1, &this->vbo_pos);
gl.bindBuffer(gate_gl2_api_buffer_type_array, this->vbo_pos);
gl.bufferData(gate_gl2_api_buffer_type_array, sizeof(vertex_array), vertex_array, gate_gl2_api_usage_type_static_draw);
#endif
}
void TrianglesGame::resize(GlSurface& surface, uint32_t width, uint32_t height)
{
this->resetRequired = true;
}
void TrianglesGame::render(GlSurface& surface)
{
GlApi& gl = surface.getGlApi();
if (this->resetRequired)
{
GATE_DEBUG_TRACE("Reset required");
this->resetSurface(surface);
this->resetRequired = false;
}
#if defined(GATE_GRAPHICS_OPENGL2_SUPPORT)
gl.bindBuffer(gate_gl2_api_buffer_type_array, this->vbo_pos);
intptr_t loc_pos = gl.getAttribLocation(this->shader_program, "aPos");
gl.enableVertexAttribArray(loc_pos);
gl.vertexAttribPointer(loc_pos, 2, gate_gl2_api_vertex_attrib_float, false, 0, NULL);
gl.setClearColor(0.1f, 0.1f, 0.1f, 1.0f);
gl.clear(OpenGL::ClearBit_ColorBuffer);
gl.drawArrays(GlApi::DrawMode_Triangles, 0, 3);
#endif
{ // finish GL drawing and swap buffers
gl.flush();
//gl.finish();
surface.swapBuffers();
}
}
void TrianglesGame::processKeyDown(Keyboard::KeyEnum key, uint32_t state)
{
}
void TrianglesGame::processKeyUp(Keyboard::KeyEnum key, uint32_t state)
{
}
void TrianglesGame::processPointerDown(real32_t x, real32_t y, real32_t xMax, real32_t yMax)
{
}
void TrianglesGame::processPointerMove(real32_t x, real32_t y, real32_t xMax, real32_t yMax)
{
}
void TrianglesGame::processPointerUp(real32_t x, real32_t y, real32_t xMax, real32_t yMax)
{
}
} // end of namespace apps
} // end of namespace gate
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