// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cstddef>
#include <cstdlib>
#include <memory>
#include <glad/glad.h>
#include "common/assert.h"
#include "common/bit_field.h"
#include "common/logging/log.h"
#include "core/core.h"
#include "core/core_timing.h"
#include "core/frontend/emu_window.h"
#include "core/hw/gpu.h"
#include "core/hw/hw.h"
#include "core/hw/lcd.h"
#include "core/memory.h"
#include "core/settings.h"
#include "core/tracer/recorder.h"
#include "video_core/debug_utils/debug_utils.h"
#include "video_core/rasterizer_interface.h"
#include "video_core/renderer_opengl/renderer_opengl.h"
#include "video_core/video_core.h"
static const char vertex_shader[] = R"(
#version 150 core
in vec2 vert_position;
in vec2 vert_tex_coord;
out vec2 frag_tex_coord;
// This is a truncated 3x3 matrix for 2D transformations:
// The upper-left 2x2 submatrix performs scaling/rotation/mirroring.
// The third column performs translation.
// The third row could be used for projection, which we don't need in 2D. It hence is assumed to
// implicitly be [0, 0, 1]
uniform mat3x2 modelview_matrix;
void main() {
// Multiply input position by the rotscale part of the matrix and then manually translate by
// the last column. This is equivalent to using a full 3x3 matrix and expanding the vector
// to `vec3(vert_position.xy, 1.0)`
gl_Position = vec4(mat2(modelview_matrix) * vert_position + modelview_matrix[2], 0.0, 1.0);
frag_tex_coord = vert_tex_coord;
}
)";
static const char fragment_shader[] = R"(
#version 150 core
in vec2 frag_tex_coord;
out vec4 color;
uniform sampler2D color_texture;
void main() {
// Swap RGBA -> ABGR so we don't have to do this on the CPU. This needs to change if we have to
// support more framebuffer pixel formats.
color = texture(color_texture, frag_tex_coord).abgr;
}
)";
/**
* Vertex structure that the drawn screen rectangles are composed of.
*/
struct ScreenRectVertex {
ScreenRectVertex(GLfloat x, GLfloat y, GLfloat u, GLfloat v) {
position[0] = x;
position[1] = y;
tex_coord[0] = u;
tex_coord[1] = v;
}
GLfloat position[2];
GLfloat tex_coord[2];
};
/**
* Defines a 1:1 pixel ortographic projection matrix with (0,0) on the top-left
* corner and (width, height) on the lower-bottom.
*
* The projection part of the matrix is trivial, hence these operations are represented
* by a 3x2 matrix.
*/
static std::array<GLfloat, 3 * 2> MakeOrthographicMatrix(const float width, const float height) {
std::array<GLfloat, 3 * 2> matrix; // Laid out in column-major order
// clang-format off
matrix[0] = 2.f / width; matrix[2] = 0.f; matrix[4] = -1.f;
matrix[1] = 0.f; matrix[3] = -2.f / height; matrix[5] = 1.f;
// Last matrix row is implicitly assumed to be [0, 0, 1].
// clang-format on
return matrix;
}
RendererOpenGL::RendererOpenGL() = default;
RendererOpenGL::~RendererOpenGL() = default;
/// Swap buffers (render frame)
void RendererOpenGL::SwapBuffers(const FramebufferInfo& framebuffer_info) {
// Maintain the rasterizer's state as a priority
OpenGLState prev_state = OpenGLState::GetCurState();
state.Apply();
if (screen_info.texture.width != (GLsizei)framebuffer_info.width ||
screen_info.texture.height != (GLsizei)framebuffer_info.height ||
screen_info.texture.pixel_format != framebuffer_info.pixel_format) {
// Reallocate texture if the framebuffer size has changed.
// This is expected to not happen very often and hence should not be a
// performance problem.
ConfigureFramebufferTexture(screen_info.texture, framebuffer_info);
}
LoadFBToScreenInfo(framebuffer_info, screen_info);
DrawScreens();
Core::System::GetInstance().perf_stats.EndSystemFrame();
// Swap buffers
render_window->PollEvents();
render_window->SwapBuffers();
Core::System::GetInstance().frame_limiter.DoFrameLimiting(CoreTiming::GetGlobalTimeUs());
Core::System::GetInstance().perf_stats.BeginSystemFrame();
prev_state.Apply();
RefreshRasterizerSetting();
if (Pica::g_debug_context && Pica::g_debug_context->recorder) {
Pica::g_debug_context->recorder->FrameFinished();
}
}
static inline u32 MortonInterleave128(u32 x, u32 y) {
// 128x128 Z-Order coordinate from 2D coordinates
static constexpr u32 xlut[] = {
0x0000, 0x0001, 0x0002, 0x0003, 0x0008, 0x0009, 0x000a, 0x000b, 0x0040, 0x0041, 0x0042,
0x0043, 0x0048, 0x0049, 0x004a, 0x004b, 0x0800, 0x0801, 0x0802, 0x0803, 0x0808, 0x0809,
0x080a, 0x080b, 0x0840, 0x0841, 0x0842, 0x0843, 0x0848, 0x0849, 0x084a, 0x084b, 0x1000,
0x1001, 0x1002, 0x1003, 0x1008, 0x1009, 0x100a, 0x100b, 0x1040, 0x1041, 0x1042, 0x1043,
0x1048, 0x1049, 0x104a, 0x104b, 0x1800, 0x1801, 0x1802, 0x1803, 0x1808, 0x1809, 0x180a,
0x180b, 0x1840, 0x1841, 0x1842, 0x1843, 0x1848, 0x1849, 0x184a, 0x184b, 0x2000, 0x2001,
0x2002, 0x2003, 0x2008, 0x2009, 0x200a, 0x200b, 0x2040, 0x2041, 0x2042, 0x2043, 0x2048,
0x2049, 0x204a, 0x204b, 0x2800, 0x2801, 0x2802, 0x2803, 0x2808, 0x2809, 0x280a, 0x280b,
0x2840, 0x2841, 0x2842, 0x2843, 0x2848, 0x2849, 0x284a, 0x284b, 0x3000, 0x3001, 0x3002,
0x3003, 0x3008, 0x3009, 0x300a, 0x300b, 0x3040, 0x3041, 0x3042, 0x3043, 0x3048, 0x3049,
0x304a, 0x304b, 0x3800, 0x3801, 0x3802, 0x3803, 0x3808, 0x3809, 0x380a, 0x380b, 0x3840,
0x3841, 0x3842, 0x3843, 0x3848, 0x3849, 0x384a, 0x384b, 0x0000, 0x0001, 0x0002, 0x0003,
0x0008, 0x0009, 0x000a, 0x000b, 0x0040, 0x0041, 0x0042, 0x0043, 0x0048, 0x0049, 0x004a,
0x004b, 0x0800, 0x0801, 0x0802, 0x0803, 0x0808, 0x0809, 0x080a, 0x080b, 0x0840, 0x0841,
0x0842, 0x0843, 0x0848, 0x0849, 0x084a, 0x084b, 0x1000, 0x1001, 0x1002, 0x1003, 0x1008,
0x1009, 0x100a, 0x100b, 0x1040, 0x1041, 0x1042, 0x1043, 0x1048, 0x1049, 0x104a, 0x104b,
0x1800, 0x1801, 0x1802, 0x1803, 0x1808, 0x1809, 0x180a, 0x180b, 0x1840, 0x1841, 0x1842,
0x1843, 0x1848, 0x1849, 0x184a, 0x184b, 0x2000, 0x2001, 0x2002, 0x2003, 0x2008, 0x2009,
0x200a, 0x200b, 0x2040, 0x2041, 0x2042, 0x2043, 0x2048, 0x2049, 0x204a, 0x204b, 0x2800,
0x2801, 0x2802, 0x2803, 0x2808, 0x2809, 0x280a, 0x280b, 0x2840, 0x2841, 0x2842, 0x2843,
0x2848, 0x2849, 0x284a, 0x284b, 0x3000, 0x3001, 0x3002, 0x3003, 0x3008, 0x3009, 0x300a,
0x300b, 0x3040, 0x3041, 0x3042, 0x3043, 0x3048, 0x3049, 0x304a, 0x304b, 0x3800, 0x3801,
0x3802, 0x3803, 0x3808, 0x3809, 0x380a, 0x380b, 0x3840, 0x3841, 0x3842, 0x3843, 0x3848,
0x3849, 0x384a, 0x384b, 0x0000, 0x0001, 0x0002, 0x0003, 0x0008, 0x0009, 0x000a, 0x000b,
0x0040, 0x0041, 0x0042, 0x0043, 0x0048, 0x0049, 0x004a, 0x004b, 0x0800, 0x0801, 0x0802,
0x0803, 0x0808, 0x0809, 0x080a, 0x080b, 0x0840, 0x0841, 0x0842, 0x0843, 0x0848, 0x0849,
0x084a, 0x084b, 0x1000, 0x1001, 0x1002, 0x1003, 0x1008, 0x1009, 0x100a, 0x100b, 0x1040,
0x1041, 0x1042, 0x1043, 0x1048, 0x1049, 0x104a, 0x104b, 0x1800, 0x1801, 0x1802, 0x1803,
0x1808, 0x1809, 0x180a, 0x180b, 0x1840, 0x1841, 0x1842, 0x1843, 0x1848, 0x1849, 0x184a,
0x184b, 0x2000, 0x2001, 0x2002, 0x2003, 0x2008, 0x2009, 0x200a, 0x200b, 0x2040, 0x2041,
0x2042, 0x2043, 0x2048, 0x2049, 0x204a, 0x204b, 0x2800, 0x2801, 0x2802, 0x2803, 0x2808,
0x2809, 0x280a, 0x280b, 0x2840, 0x2841, 0x2842, 0x2843, 0x2848, 0x2849, 0x284a, 0x284b,
0x3000, 0x3001, 0x3002, 0x3003, 0x3008, 0x3009, 0x300a, 0x300b, 0x3040, 0x3041, 0x3042,
0x3043, 0x3048, 0x3049, 0x304a, 0x304b, 0x3800, 0x3801, 0x3802, 0x3803, 0x3808, 0x3809,
0x380a, 0x380b, 0x3840, 0x3841, 0x3842, 0x3843, 0x3848, 0x3849, 0x384a, 0x384b,
};
static constexpr u32 ylut[] = {
0x0000, 0x0004, 0x0010, 0x0014, 0x0020, 0x0024, 0x0030, 0x0034, 0x0080, 0x0084, 0x0090,
0x0094, 0x00a0, 0x00a4, 0x00b0, 0x00b4, 0x0100, 0x0104, 0x0110, 0x0114, 0x0120, 0x0124,
0x0130, 0x0134, 0x0180, 0x0184, 0x0190, 0x0194, 0x01a0, 0x01a4, 0x01b0, 0x01b4, 0x0200,
0x0204, 0x0210, 0x0214, 0x0220, 0x0224, 0x0230, 0x0234, 0x0280, 0x0284, 0x0290, 0x0294,
0x02a0, 0x02a4, 0x02b0, 0x02b4, 0x0300, 0x0304, 0x0310, 0x0314, 0x0320, 0x0324, 0x0330,
0x0334, 0x0380, 0x0384, 0x0390, 0x0394, 0x03a0, 0x03a4, 0x03b0, 0x03b4, 0x0400, 0x0404,
0x0410, 0x0414, 0x0420, 0x0424, 0x0430, 0x0434, 0x0480, 0x0484, 0x0490, 0x0494, 0x04a0,
0x04a4, 0x04b0, 0x04b4, 0x0500, 0x0504, 0x0510, 0x0514, 0x0520, 0x0524, 0x0530, 0x0534,
0x0580, 0x0584, 0x0590, 0x0594, 0x05a0, 0x05a4, 0x05b0, 0x05b4, 0x0600, 0x0604, 0x0610,
0x0614, 0x0620, 0x0624, 0x0630, 0x0634, 0x0680, 0x0684, 0x0690, 0x0694, 0x06a0, 0x06a4,
0x06b0, 0x06b4, 0x0700, 0x0704, 0x0710, 0x0714, 0x0720, 0x0724, 0x0730, 0x0734, 0x0780,
0x0784, 0x0790, 0x0794, 0x07a0, 0x07a4, 0x07b0, 0x07b4, 0x0000, 0x0004, 0x0010, 0x0014,
0x0020, 0x0024, 0x0030, 0x0034, 0x0080, 0x0084, 0x0090, 0x0094, 0x00a0, 0x00a4, 0x00b0,
0x00b4, 0x0100, 0x0104, 0x0110, 0x0114, 0x0120, 0x0124, 0x0130, 0x0134, 0x0180, 0x0184,
0x0190, 0x0194, 0x01a0, 0x01a4, 0x01b0, 0x01b4, 0x0200, 0x0204, 0x0210, 0x0214, 0x0220,
0x0224, 0x0230, 0x0234, 0x0280, 0x0284, 0x0290, 0x0294, 0x02a0, 0x02a4, 0x02b0, 0x02b4,
0x0300, 0x0304, 0x0310, 0x0314, 0x0320, 0x0324, 0x0330, 0x0334, 0x0380, 0x0384, 0x0390,
0x0394, 0x03a0, 0x03a4, 0x03b0, 0x03b4, 0x0400, 0x0404, 0x0410, 0x0414, 0x0420, 0x0424,
0x0430, 0x0434, 0x0480, 0x0484, 0x0490, 0x0494, 0x04a0, 0x04a4, 0x04b0, 0x04b4, 0x0500,
0x0504, 0x0510, 0x0514, 0x0520, 0x0524, 0x0530, 0x0534, 0x0580, 0x0584, 0x0590, 0x0594,
0x05a0, 0x05a4, 0x05b0, 0x05b4, 0x0600, 0x0604, 0x0610, 0x0614, 0x0620, 0x0624, 0x0630,
0x0634, 0x0680, 0x0684, 0x0690, 0x0694, 0x06a0, 0x06a4, 0x06b0, 0x06b4, 0x0700, 0x0704,
0x0710, 0x0714, 0x0720, 0x0724, 0x0730, 0x0734, 0x0780, 0x0784, 0x0790, 0x0794, 0x07a0,
0x07a4, 0x07b0, 0x07b4, 0x0000, 0x0004, 0x0010, 0x0014, 0x0020, 0x0024, 0x0030, 0x0034,
0x0080, 0x0084, 0x0090, 0x0094, 0x00a0, 0x00a4, 0x00b0, 0x00b4, 0x0100, 0x0104, 0x0110,
0x0114, 0x0120, 0x0124, 0x0130, 0x0134, 0x0180, 0x0184, 0x0190, 0x0194, 0x01a0, 0x01a4,
0x01b0, 0x01b4, 0x0200, 0x0204, 0x0210, 0x0214, 0x0220, 0x0224, 0x0230, 0x0234, 0x0280,
0x0284, 0x0290, 0x0294, 0x02a0, 0x02a4, 0x02b0, 0x02b4, 0x0300, 0x0304, 0x0310, 0x0314,
0x0320, 0x0324, 0x0330, 0x0334, 0x0380, 0x0384, 0x0390, 0x0394, 0x03a0, 0x03a4, 0x03b0,
0x03b4, 0x0400, 0x0404, 0x0410, 0x0414, 0x0420, 0x0424, 0x0430, 0x0434, 0x0480, 0x0484,
0x0490, 0x0494, 0x04a0, 0x04a4, 0x04b0, 0x04b4, 0x0500, 0x0504, 0x0510, 0x0514, 0x0520,
0x0524, 0x0530, 0x0534, 0x0580, 0x0584, 0x0590, 0x0594, 0x05a0, 0x05a4, 0x05b0, 0x05b4,
0x0600, 0x0604, 0x0610, 0x0614, 0x0620, 0x0624, 0x0630, 0x0634, 0x0680, 0x0684, 0x0690,
0x0694, 0x06a0, 0x06a4, 0x06b0, 0x06b4, 0x0700, 0x0704, 0x0710, 0x0714, 0x0720, 0x0724,
0x0730, 0x0734, 0x0780, 0x0784, 0x0790, 0x0794, 0x07a0, 0x07a4, 0x07b0, 0x07b4,
};
return xlut[x % 128] + ylut[y % 128];
}
static inline u32 GetMortonOffset128(u32 x, u32 y, u32 bytes_per_pixel) {
// Calculates the offset of the position of the pixel in Morton order
// Framebuffer images are split into 128x128 tiles.
const unsigned int block_height = 128;
const unsigned int coarse_x = x & ~127;
u32 i = MortonInterleave128(x, y);
const unsigned int offset = coarse_x * block_height;
return (i + offset) * bytes_per_pixel;
}
static void MortonCopyPixels128(u32 width, u32 height, u32 bytes_per_pixel, u32 gl_bytes_per_pixel,
u8* morton_data, u8* gl_data, bool morton_to_gl) {
u8* data_ptrs[2];
for (unsigned y = 0; y < height; ++y) {
for (unsigned x = 0; x < width; ++x) {
const u32 coarse_y = y & ~127;
u32 morton_offset =
GetMortonOffset128(x, y, bytes_per_pixel) + coarse_y * width * bytes_per_pixel;
u32 gl_pixel_index = (x + (height - 1 - y) * width) * gl_bytes_per_pixel;
data_ptrs[morton_to_gl] = morton_data + morton_offset;
data_ptrs[!morton_to_gl] = &gl_data[gl_pixel_index];
memcpy(data_ptrs[0], data_ptrs[1], bytes_per_pixel);
}
}
}
/**
* Loads framebuffer from emulated memory into the active OpenGL texture.
*/
void RendererOpenGL::LoadFBToScreenInfo(const FramebufferInfo& framebuffer_info,
ScreenInfo& screen_info) {
const u32 bpp{FramebufferInfo::BytesPerPixel(framebuffer_info.pixel_format)};
const u32 size_in_bytes{framebuffer_info.stride * framebuffer_info.height * bpp};
MortonCopyPixels128(framebuffer_info.width, framebuffer_info.height, bpp, 4,
Memory::GetPointer(framebuffer_info.address), gl_framebuffer_data.data(),
true);
LOG_TRACE(Render_OpenGL, "0x%08x bytes from 0x%llx(%dx%d), fmt %x", size_in_bytes,
framebuffer_info.address, framebuffer_info.width, framebuffer_info.height,
(int)framebuffer_info.format);
// Ensure no bad interactions with GL_UNPACK_ALIGNMENT, which by default
// only allows rows to have a memory alignement of 4.
ASSERT(framebuffer_info.stride % 4 == 0);
// Reset the screen info's display texture to its own permanent texture
screen_info.display_texture = screen_info.texture.resource.handle;
screen_info.display_texcoords = MathUtil::Rectangle<float>(0.f, 0.f, 1.f, 1.f);
Memory::RasterizerFlushRegion(framebuffer_info.address, size_in_bytes);
state.texture_units[0].texture_2d = screen_info.texture.resource.handle;
state.Apply();
glActiveTexture(GL_TEXTURE0);
glPixelStorei(GL_UNPACK_ROW_LENGTH, (GLint)framebuffer_info.stride);
// Update existing texture
// TODO: Test what happens on hardware when you change the framebuffer dimensions so that
// they differ from the LCD resolution.
// TODO: Applications could theoretically crash Citra here by specifying too large
// framebuffer sizes. We should make sure that this cannot happen.
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, framebuffer_info.width, framebuffer_info.height,
screen_info.texture.gl_format, screen_info.texture.gl_type,
gl_framebuffer_data.data());
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
state.texture_units[0].texture_2d = 0;
state.Apply();
}
/**
* Fills active OpenGL texture with the given RGB color. Since the color is solid, the texture can
* be 1x1 but will stretch across whatever it's rendered on.
*/
void RendererOpenGL::LoadColorToActiveGLTexture(u8 color_r, u8 color_g, u8 color_b,
const TextureInfo& texture) {
state.texture_units[0].texture_2d = texture.resource.handle;
state.Apply();
glActiveTexture(GL_TEXTURE0);
u8 framebuffer_data[3] = {color_r, color_g, color_b};
// Update existing texture
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, framebuffer_data);
state.texture_units[0].texture_2d = 0;
state.Apply();
}
/**
* Initializes the OpenGL state and creates persistent objects.
*/
void RendererOpenGL::InitOpenGLObjects() {
glClearColor(Settings::values.bg_red, Settings::values.bg_green, Settings::values.bg_blue,
0.0f);
// Link shaders and get variable locations
shader.Create(vertex_shader, fragment_shader);
state.draw.shader_program = shader.handle;
state.Apply();
uniform_modelview_matrix = glGetUniformLocation(shader.handle, "modelview_matrix");
uniform_color_texture = glGetUniformLocation(shader.handle, "color_texture");
attrib_position = glGetAttribLocation(shader.handle, "vert_position");
attrib_tex_coord = glGetAttribLocation(shader.handle, "vert_tex_coord");
// Generate VBO handle for drawing
vertex_buffer.Create();
// Generate VAO
vertex_array.Create();
state.draw.vertex_array = vertex_array.handle;
state.draw.vertex_buffer = vertex_buffer.handle;
state.draw.uniform_buffer = 0;
state.Apply();
// Attach vertex data to VAO
glBufferData(GL_ARRAY_BUFFER, sizeof(ScreenRectVertex) * 4, nullptr, GL_STREAM_DRAW);
glVertexAttribPointer(attrib_position, 2, GL_FLOAT, GL_FALSE, sizeof(ScreenRectVertex),
(GLvoid*)offsetof(ScreenRectVertex, position));
glVertexAttribPointer(attrib_tex_coord, 2, GL_FLOAT, GL_FALSE, sizeof(ScreenRectVertex),
(GLvoid*)offsetof(ScreenRectVertex, tex_coord));
glEnableVertexAttribArray(attrib_position);
glEnableVertexAttribArray(attrib_tex_coord);
// Allocate textures for the screen
screen_info.texture.resource.Create();
// Allocation of storage is deferred until the first frame, when we
// know the framebuffer size.
state.texture_units[0].texture_2d = screen_info.texture.resource.handle;
state.Apply();
glActiveTexture(GL_TEXTURE0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
screen_info.display_texture = screen_info.texture.resource.handle;
state.texture_units[0].texture_2d = 0;
state.Apply();
}
void RendererOpenGL::ConfigureFramebufferTexture(TextureInfo& texture,
const FramebufferInfo& framebuffer_info) {
texture.width = framebuffer_info.width;
texture.height = framebuffer_info.height;
GLint internal_format;
switch (framebuffer_info.pixel_format) {
case FramebufferInfo::PixelFormat::ABGR8:
// Use RGBA8 and swap in the fragment shader
internal_format = GL_RGBA;
texture.gl_format = GL_RGBA;
texture.gl_type = GL_UNSIGNED_INT_8_8_8_8;
gl_framebuffer_data.resize(texture.width * texture.height * 4);
break;
default:
UNIMPLEMENTED();
}
state.texture_units[0].texture_2d = texture.resource.handle;
state.Apply();
glActiveTexture(GL_TEXTURE0);
glTexImage2D(GL_TEXTURE_2D, 0, internal_format, texture.width, texture.height, 0,
texture.gl_format, texture.gl_type, nullptr);
state.texture_units[0].texture_2d = 0;
state.Apply();
}
void RendererOpenGL::DrawSingleScreen(const ScreenInfo& screen_info, float x, float y, float w,
float h) {
auto& texcoords = screen_info.display_texcoords;
std::array<ScreenRectVertex, 4> vertices = {{
ScreenRectVertex(x, y, texcoords.top, texcoords.right),
ScreenRectVertex(x + w, y, texcoords.bottom, texcoords.right),
ScreenRectVertex(x, y + h, texcoords.top, texcoords.left),
ScreenRectVertex(x + w, y + h, texcoords.bottom, texcoords.left),
}};
state.texture_units[0].texture_2d = screen_info.display_texture;
state.Apply();
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices.data());
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
state.texture_units[0].texture_2d = 0;
state.Apply();
}
/**
* Draws the emulated screens to the emulator window.
*/
void RendererOpenGL::DrawScreens() {
const auto& layout = render_window->GetFramebufferLayout();
const auto& screen = layout.screen;
glViewport(0, 0, layout.width, layout.height);
glClear(GL_COLOR_BUFFER_BIT);
// Set projection matrix
std::array<GLfloat, 3 * 2> ortho_matrix =
MakeOrthographicMatrix((float)layout.width, (float)layout.height);
glUniformMatrix3x2fv(uniform_modelview_matrix, 1, GL_FALSE, ortho_matrix.data());
// Bind texture in Texture Unit 0
glActiveTexture(GL_TEXTURE0);
glUniform1i(uniform_color_texture, 0);
DrawSingleScreen(screen_info, (float)screen.left, (float)screen.top, (float)screen.GetWidth(),
(float)screen.GetHeight());
m_current_frame++;
}
/// Updates the framerate
void RendererOpenGL::UpdateFramerate() {}
/**
* Set the emulator window to use for renderer
* @param window EmuWindow handle to emulator window to use for rendering
*/
void RendererOpenGL::SetWindow(EmuWindow* window) {
render_window = window;
}
static const char* GetSource(GLenum source) {
#define RET(s) \
case GL_DEBUG_SOURCE_##s: \
return #s
switch (source) {
RET(API);
RET(WINDOW_SYSTEM);
RET(SHADER_COMPILER);
RET(THIRD_PARTY);
RET(APPLICATION);
RET(OTHER);
default:
UNREACHABLE();
}
#undef RET
}
static const char* GetType(GLenum type) {
#define RET(t) \
case GL_DEBUG_TYPE_##t: \
return #t
switch (type) {
RET(ERROR);
RET(DEPRECATED_BEHAVIOR);
RET(UNDEFINED_BEHAVIOR);
RET(PORTABILITY);
RET(PERFORMANCE);
RET(OTHER);
RET(MARKER);
default:
UNREACHABLE();
}
#undef RET
}
static void APIENTRY DebugHandler(GLenum source, GLenum type, GLuint id, GLenum severity,
GLsizei length, const GLchar* message, const void* user_param) {
Log::Level level;
switch (severity) {
case GL_DEBUG_SEVERITY_HIGH:
level = Log::Level::Error;
break;
case GL_DEBUG_SEVERITY_MEDIUM:
level = Log::Level::Warning;
break;
case GL_DEBUG_SEVERITY_NOTIFICATION:
case GL_DEBUG_SEVERITY_LOW:
level = Log::Level::Debug;
break;
}
LOG_GENERIC(Log::Class::Render_OpenGL, level, "%s %s %d: %s", GetSource(source), GetType(type),
id, message);
}
/// Initialize the renderer
bool RendererOpenGL::Init() {
render_window->MakeCurrent();
if (GLAD_GL_KHR_debug) {
glEnable(GL_DEBUG_OUTPUT);
glDebugMessageCallback(DebugHandler, nullptr);
}
const char* gl_version{reinterpret_cast<char const*>(glGetString(GL_VERSION))};
const char* gpu_vendor{reinterpret_cast<char const*>(glGetString(GL_VENDOR))};
const char* gpu_model{reinterpret_cast<char const*>(glGetString(GL_RENDERER))};
LOG_INFO(Render_OpenGL, "GL_VERSION: %s", gl_version);
LOG_INFO(Render_OpenGL, "GL_VENDOR: %s", gpu_vendor);
LOG_INFO(Render_OpenGL, "GL_RENDERER: %s", gpu_model);
Core::Telemetry().AddField(Telemetry::FieldType::UserSystem, "GPU_Vendor", gpu_vendor);
Core::Telemetry().AddField(Telemetry::FieldType::UserSystem, "GPU_Model", gpu_model);
Core::Telemetry().AddField(Telemetry::FieldType::UserSystem, "GPU_OpenGL_Version", gl_version);
if (!GLAD_GL_VERSION_3_3) {
return false;
}
InitOpenGLObjects();
RefreshRasterizerSetting();
return true;
}
/// Shutdown the renderer
void RendererOpenGL::ShutDown() {}