Drezil/imgui
1
0
Fork 0
mirror of https://github.com/Drezil/imgui.git synced 2024-11-22 11:57:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

Examples: DirectX11: moved shader to be close to its usage location,

Browse Source
This commit is contained in:
omar 2014-12-03 18:46:13 +00:00
parent 52b5376d9b
commit 2e5b81627f
3 changed files with 118 additions and 121 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

91
examples/directx11_example/main.cpp
View File

@ -13,9 +13,6 @@
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strdup #pragma warning (disable: 4996) // 'This function or variable may be unsafe': strdup
extern const char* vertexShader; // Implemented at the bottom
extern const char* pixelShader;
static HWND hWnd; static HWND hWnd;
static ID3D11Device* g_pd3dDevice = NULL; static ID3D11Device* g_pd3dDevice = NULL;
static ID3D11DeviceContext* g_pd3dDeviceImmediateContext = NULL; static ID3D11DeviceContext* g_pd3dDeviceImmediateContext = NULL;
@ -222,6 +219,34 @@ HRESULT InitDeviceD3D(HWND hWnd)
// Create the vertex shader // Create the vertex shader
{ {
static const char* vertexShader =
"cbuffer vertexBuffer : register(c0) \
{\
float4x4 ProjectionMatrix; \
};\
struct VS_INPUT\
{\
float2 pos : POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
PS_INPUT main(VS_INPUT input)\
{\
PS_INPUT output;\
output.pos = mul( ProjectionMatrix, float4(input.pos.xy, 0.f, 1.f));\
output.col = input.col;\
output.uv = input.uv;\
return output;\
}";
D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", "vs_5_0", 0, 0, &g_pVertexShaderBlob, NULL); D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", "vs_5_0", 0, 0, &g_pVertexShaderBlob, NULL);
if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob! if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
return E_FAIL; return E_FAIL;
@ -252,6 +277,22 @@ HRESULT InitDeviceD3D(HWND hWnd)
// Create the pixel shader // Create the pixel shader
{ {
static const char* pixelShader =
"struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
sampler sampler0;\
Texture2D texture0;\
\
float4 main(PS_INPUT input) : SV_Target\
{\
float4 out_col = texture0.Sample(sampler0, input.uv);\
return input.col * out_col;\
}";
D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_5_0", 0, 0, &g_pPixelShaderBlob, NULL); D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_5_0", 0, 0, &g_pPixelShaderBlob, NULL);
if (g_pPixelShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob! if (g_pPixelShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
return E_FAIL; return E_FAIL;
@ -563,47 +604,3 @@ int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
return 0; return 0;
} }
static const char* vertexShader = "\
cbuffer vertexBuffer : register(c0) \
{\
float4x4 ProjectionMatrix; \
};\
struct VS_INPUT\
{\
float2 pos : POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
\
PS_INPUT main(VS_INPUT input)\
{\
PS_INPUT output;\
output.pos = mul( ProjectionMatrix, float4(input.pos.xy, 0.f, 1.f));\
output.col = input.col;\
output.uv = input.uv;\
return output;\
}";
static const char* pixelShader = "\
struct PS_INPUT\
{\
float4 pos : SV_POSITION;\
float4 col : COLOR0;\
float2 uv : TEXCOORD0;\
};\
sampler sampler0;\
Texture2D texture0;\
\
float4 main(PS_INPUT input) : SV_Target\
{\
float4 out_col = texture0.Sample(sampler0, input.uv);\
return input.col * out_col;\
}";

144
examples/opengl3_example/main.cpp
View File

@ -60,7 +60,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
glUniform1i(texture_location, 0); glUniform1i(texture_location, 0);
glUniformMatrix4fv(ortho_location, 1, GL_FALSE, &ortho_projection[0][0]); glUniformMatrix4fv(ortho_location, 1, GL_FALSE, &ortho_projection[0][0]);
// Grow our buffer according to what we need // Grow our buffer according to what we need
size_t total_vtx_count = 0; size_t total_vtx_count = 0;
for (int n = 0; n < cmd_lists_count; n++) for (int n = 0; n < cmd_lists_count; n++)
total_vtx_count += cmd_lists[n]->vtx_buffer.size(); total_vtx_count += cmd_lists[n]->vtx_buffer.size();
@ -72,7 +72,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
glBufferData(GL_ARRAY_BUFFER, neededBufferSize, NULL, GL_STREAM_DRAW); glBufferData(GL_ARRAY_BUFFER, neededBufferSize, NULL, GL_STREAM_DRAW);
} }
// Copy and convert all vertices into a single contiguous buffer // Copy and convert all vertices into a single contiguous buffer
unsigned char* buffer_data = (unsigned char*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY); unsigned char* buffer_data = (unsigned char*)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
if (!buffer_data) if (!buffer_data)
return; return;
@ -101,7 +101,7 @@ static void ImImpl_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_c
cmd_offset = vtx_offset; cmd_offset = vtx_offset;
} }
// Restore modified state // Restore modified state
glBindVertexArray(0); glBindVertexArray(0);
glUseProgram(0); glUseProgram(0);
glDisable(GL_SCISSOR_TEST); glDisable(GL_SCISSOR_TEST);
@ -179,30 +179,30 @@ void InitGL()
fprintf(stderr, "Error: %s\n", glewGetErrorString(err)); fprintf(stderr, "Error: %s\n", glewGetErrorString(err));
const GLchar *vertex_shader = const GLchar *vertex_shader =
"#version 330\n" "#version 330\n"
"uniform mat4 ortho;\n" "uniform mat4 ortho;\n"
"in vec2 Position;\n" "in vec2 Position;\n"
"in vec2 UV;\n" "in vec2 UV;\n"
"in vec4 Colour;\n" "in vec4 Colour;\n"
"out vec2 Frag_UV;\n" "out vec2 Frag_UV;\n"
"out vec4 Frag_Colour;\n" "out vec4 Frag_Colour;\n"
"void main()\n" "void main()\n"
"{\n" "{\n"
" Frag_UV = UV;\n" " Frag_UV = UV;\n"
" Frag_Colour = Colour;\n" " Frag_Colour = Colour;\n"
" gl_Position = ortho*vec4(Position.xy,0,1);\n" " gl_Position = ortho*vec4(Position.xy,0,1);\n"
"}\n"; "}\n";
const GLchar* fragment_shader = const GLchar* fragment_shader =
"#version 330\n" "#version 330\n"
"uniform sampler2D Texture;\n" "uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n" "in vec2 Frag_UV;\n"
"in vec4 Frag_Colour;\n" "in vec4 Frag_Colour;\n"
"out vec4 FragColor;\n" "out vec4 FragColor;\n"
"void main()\n" "void main()\n"
"{\n" "{\n"
" FragColor = Frag_Colour * texture( Texture, Frag_UV.st);\n" " FragColor = Frag_Colour * texture( Texture, Frag_UV.st);\n"
"}\n"; "}\n";
shader_handle = glCreateProgram(); shader_handle = glCreateProgram();
vert_handle = glCreateShader(GL_VERTEX_SHADER); vert_handle = glCreateShader(GL_VERTEX_SHADER);
@ -241,12 +241,12 @@ void InitGL()
void InitImGui() void InitImGui()
{ {
int w, h; int w, h;
int display_w, display_h; int display_w, display_h;
glfwGetWindowSize(window, &w, &h); glfwGetWindowSize(window, &w, &h);
glfwGetFramebufferSize(window, &display_w, &display_h); glfwGetFramebufferSize(window, &display_w, &display_h);
mousePosScale.x = (float)display_w / w; // Some screens e.g. Retina display have framebuffer size != from window size, and mouse inputs are given in window/screen coordinates. mousePosScale.x = (float)display_w / w; // Some screens e.g. Retina display have framebuffer size != from window size, and mouse inputs are given in window/screen coordinates.
mousePosScale.y = (float)display_h / h; mousePosScale.y = (float)display_h / h;
ImGuiIO& io = ImGui::GetIO(); ImGuiIO& io = ImGui::GetIO();
io.DisplaySize = ImVec2((float)display_w, (float)display_h); // Display size, in pixels. For clamping windows positions. io.DisplaySize = ImVec2((float)display_w, (float)display_h); // Display size, in pixels. For clamping windows positions.
@ -302,9 +302,9 @@ void UpdateImGui()
// (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents()) // (we already got mouse wheel, keyboard keys & characters from glfw callbacks polled in glfwPollEvents())
double mouse_x, mouse_y; double mouse_x, mouse_y;
glfwGetCursorPos(window, &mouse_x, &mouse_y); glfwGetCursorPos(window, &mouse_x, &mouse_y);
io.MousePos = ImVec2((float)mouse_x * mousePosScale.x, (float)mouse_y * mousePosScale.y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.) io.MousePos = ImVec2((float)mouse_x * mousePosScale.x, (float)mouse_y * mousePosScale.y); // Mouse position, in pixels (set to -1,-1 if no mouse / on another screen, etc.)
io.MouseDown[0] = mousePressed[0] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame. io.MouseDown[0] = mousePressed[0] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_LEFT) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
io.MouseDown[1] = mousePressed[1] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0; io.MouseDown[1] = mousePressed[1] || glfwGetMouseButton(window, GLFW_MOUSE_BUTTON_RIGHT) != 0;
// Start the frame // Start the frame
ImGui::NewFrame(); ImGui::NewFrame();
@ -323,46 +323,46 @@ int main(int argc, char** argv)
glfwPollEvents(); glfwPollEvents();
UpdateImGui(); UpdateImGui();
static bool show_test_window = true; static bool show_test_window = true;
static bool show_another_window = false; static bool show_another_window = false;
// 1. Show a simple window // 1. Show a simple window
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug" // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
{ {
static float f; static float f;
ImGui::Text("Hello, world!"); ImGui::Text("Hello, world!");
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
show_test_window ^= ImGui::Button("Test Window"); show_test_window ^= ImGui::Button("Test Window");
show_another_window ^= ImGui::Button("Another Window"); show_another_window ^= ImGui::Button("Another Window");
// Calculate and show frame rate // Calculate and show frame rate
static float ms_per_frame[120] = { 0 }; static float ms_per_frame[120] = { 0 };
static int ms_per_frame_idx = 0; static int ms_per_frame_idx = 0;
static float ms_per_frame_accum = 0.0f; static float ms_per_frame_accum = 0.0f;
ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx]; ms_per_frame_accum -= ms_per_frame[ms_per_frame_idx];
ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f; ms_per_frame[ms_per_frame_idx] = ImGui::GetIO().DeltaTime * 1000.0f;
ms_per_frame_accum += ms_per_frame[ms_per_frame_idx]; ms_per_frame_accum += ms_per_frame[ms_per_frame_idx];
ms_per_frame_idx = (ms_per_frame_idx + 1) % 120; ms_per_frame_idx = (ms_per_frame_idx + 1) % 120;
const float ms_per_frame_avg = ms_per_frame_accum / 120; const float ms_per_frame_avg = ms_per_frame_accum / 120;
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg); ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", ms_per_frame_avg, 1000.0f / ms_per_frame_avg);
} }
// 2. Show another simple window, this time using an explicit Begin/End pair // 2. Show another simple window, this time using an explicit Begin/End pair
if (show_another_window) if (show_another_window)
{ {
ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100)); ImGui::Begin("Another Window", &show_another_window, ImVec2(200,100));
ImGui::Text("Hello"); ImGui::Text("Hello");
ImGui::End(); ImGui::End();
} }
// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow() // 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
if (show_test_window) if (show_test_window)
{ {
ImGui::SetNewWindowDefaultPos(ImVec2(650, 20)); // Normally user code doesn't need/want to call this, because positions are saved in .ini file. Here we just want to make the demo initial state a bit more friendly! ImGui::SetNewWindowDefaultPos(ImVec2(650, 20)); // Normally user code doesn't need/want to call this, because positions are saved in .ini file. Here we just want to make the demo initial state a bit more friendly!
ImGui::ShowTestWindow(&show_test_window); ImGui::ShowTestWindow(&show_test_window);
} }
// Rendering // Rendering
glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y); glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
glClearColor(0.8f, 0.6f, 0.6f, 1.0f); glClearColor(0.8f, 0.6f, 0.6f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT); glClear(GL_COLOR_BUFFER_BIT);
@ -370,7 +370,7 @@ int main(int argc, char** argv)
glfwSwapBuffers(window); glfwSwapBuffers(window);
} }
// Cleanup // Cleanup
if (vao_handle) glDeleteVertexArrays(1, &vao_handle); if (vao_handle) glDeleteVertexArrays(1, &vao_handle);
if (vbo_handle) glDeleteBuffers(1, &vbo_handle); if (vbo_handle) glDeleteBuffers(1, &vbo_handle);
glDetachShader(shader_handle, vert_handle); glDetachShader(shader_handle, vert_handle);
@ -383,4 +383,4 @@ int main(int argc, char** argv)
glfwTerminate(); glfwTerminate();
return 0; return 0;
} }

4
examples/opengl_example/main.cpp
View File

@ -305,9 +305,9 @@ int main(int argc, char** argv)
glfwSwapBuffers(window); glfwSwapBuffers(window);
} }
// Cleanup // Cleanup
ImGui::Shutdown(); ImGui::Shutdown();
glfwTerminate(); glfwTerminate();
return 0; return 0;
} }