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Review BeginTextureMode() usage

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Moved outside BeginDrawing()/EndDrawing() to illustrate drawing is happening to an external texture (not screen)
This commit is contained in:
Ray
2021-06-23 01:25:09 +02:00
parent f989048bda
commit 716e26aa37
8 changed files with 113 additions and 143 deletions
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51
examples/shaders/shaders_custom_uniform.c
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@@ -65,11 +65,11 @@ int main(void)
// Setup orbital camera
SetCameraMode(camera, CAMERA_ORBITAL); // Set an orbital camera mode
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
@@ -81,55 +81,46 @@ int main(void)
// Send new value to the shader to be used on drawing
SetShaderValue(shader, swirlCenterLoc, swirlCenter, SHADER_UNIFORM_VEC2);
UpdateCamera(&camera); // Update camera
UpdateCamera(&camera); // Update camera
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginTextureMode(target); // Enable drawing to texture
ClearBackground(RAYWHITE); // Clear texture background
BeginMode3D(camera); // Begin 3d mode drawing
DrawModel(model, position, 0.5f, WHITE); // Draw 3d model with texture
DrawGrid(10, 1.0f); // Draw a grid
EndMode3D(); // End 3d mode drawing, returns to orthographic 2d mode
DrawText("TEXT DRAWN IN RENDER TEXTURE", 200, 10, 30, RED);
EndTextureMode(); // End drawing to texture (now we have a texture available for next passes)
BeginDrawing();
ClearBackground(RAYWHITE); // Clear screen background
ClearBackground(RAYWHITE);
BeginTextureMode(target); // Enable drawing to texture
ClearBackground(RAYWHITE); // Clear texture background
BeginMode3D(camera); // Begin 3d mode drawing
DrawModel(model, position, 0.5f, WHITE); // Draw 3d model with texture
DrawGrid(10, 1.0f); // Draw a grid
EndMode3D(); // End 3d mode drawing, returns to orthographic 2d mode
DrawText("TEXT DRAWN IN RENDER TEXTURE", 200, 10, 30, RED);
EndTextureMode(); // End drawing to texture (now we have a texture available for next passes)
// Enable shader using the custom uniform
BeginShaderMode(shader);
// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
DrawTextureRec(target.texture, (Rectangle){ 0, 0, (float)target.texture.width, (float)-target.texture.height }, (Vector2){ 0, 0 }, WHITE);
EndShaderMode();
// Draw some 2d text over drawn texture
DrawText("(c) Barracks 3D model by Alberto Cano", screenWidth - 220, screenHeight - 20, 10, GRAY);
DrawFPS(10, 10);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadShader(shader); // Unload shader
UnloadTexture(texture); // Unload texture
UnloadModel(model); // Unload model
UnloadRenderTexture(target); // Unload render texture
UnloadShader(shader); // Unload shader
UnloadTexture(texture); // Unload texture
UnloadModel(model); // Unload model
UnloadRenderTexture(target); // Unload render texture
CloseWindow(); // Close window and OpenGL context
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;

34
examples/shaders/shaders_eratosthenes.c
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@@ -46,11 +46,11 @@ int main(void)
// NOTE: Defining 0 (NULL) for vertex shader forces usage of internal default vertex shader
Shader shader = LoadShader(0, TextFormat("resources/shaders/glsl%i/eratosthenes.fs", GLSL_VERSION));
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
@@ -59,35 +59,33 @@ int main(void)
// Draw
//----------------------------------------------------------------------------------
BeginTextureMode(target); // Enable drawing to texture
ClearBackground(BLACK); // Clear the render texture
// Draw a rectangle in shader mode to be used as shader canvas
// NOTE: Rectangle uses font white character texture coordinates,
// so shader can not be applied here directly because input vertexTexCoord
// do not represent full screen coordinates (space where want to apply shader)
DrawRectangle(0, 0, GetScreenWidth(), GetScreenHeight(), BLACK);
EndTextureMode(); // End drawing to texture (now we have a blank texture available for the shader)
BeginDrawing();
ClearBackground(RAYWHITE);
BeginTextureMode(target); // Enable drawing to texture
ClearBackground(BLACK); // Clear the render texture
// Draw a rectangle in shader mode to be used as shader canvas
// NOTE: Rectangle uses font white character texture coordinates,
// so shader can not be applied here directly because input vertexTexCoord
// do not represent full screen coordinates (space where want to apply shader)
DrawRectangle(0, 0, GetScreenWidth(), GetScreenHeight(), BLACK);
EndTextureMode(); // End drawing to texture (now we have a blank texture available for the shader)
ClearBackground(RAYWHITE); // Clear screen background
BeginShaderMode(shader);
// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
DrawTextureRec(target.texture, (Rectangle){ 0, 0, (float)target.texture.width, (float)-target.texture.height }, (Vector2){ 0.0f, 0.0f }, WHITE);
EndShaderMode();
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadShader(shader); // Unload shader
UnloadRenderTexture(target); // Unload texture
UnloadShader(shader); // Unload shader
UnloadRenderTexture(target); // Unload render texture
CloseWindow(); // Close window and OpenGL context
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;

42
examples/shaders/shaders_julia_set.c
View File

@@ -75,15 +75,15 @@ int main(void)
SetShaderValue(shader, zoomLoc, &zoom, SHADER_UNIFORM_FLOAT);
SetShaderValue(shader, offsetLoc, offset, SHADER_UNIFORM_VEC2);
int incrementSpeed = 0; // Multiplier of speed to change c value
bool showControls = true; // Show controls
bool pause = false; // Pause animation
int incrementSpeed = 0; // Multiplier of speed to change c value
bool showControls = true; // Show controls
bool pause = false; // Pause animation
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
@@ -145,20 +145,19 @@ int main(void)
// Draw
//----------------------------------------------------------------------------------
// Using a render texture to draw Julia set
BeginTextureMode(target); // Enable drawing to texture
ClearBackground(BLACK); // Clear the render texture
// Draw a rectangle in shader mode to be used as shader canvas
// NOTE: Rectangle uses font white character texture coordinates,
// so shader can not be applied here directly because input vertexTexCoord
// do not represent full screen coordinates (space where want to apply shader)
DrawRectangle(0, 0, GetScreenWidth(), GetScreenHeight(), BLACK);
EndTextureMode();
BeginDrawing();
ClearBackground(BLACK); // Clear the screen of the previous frame.
// Using a render texture to draw Julia set
BeginTextureMode(target); // Enable drawing to texture
ClearBackground(BLACK); // Clear the render texture
// Draw a rectangle in shader mode to be used as shader canvas
// NOTE: Rectangle uses font white character texture coordinates,
// so shader can not be applied here directly because input vertexTexCoord
// do not represent full screen coordinates (space where want to apply shader)
DrawRectangle(0, 0, GetScreenWidth(), GetScreenHeight(), BLACK);
EndTextureMode();
ClearBackground(BLACK); // Clear screen background
// Draw the saved texture and rendered julia set with shader
// NOTE: We do not invert texture on Y, already considered inside shader
@@ -176,17 +175,16 @@ int main(void)
DrawText("Press KEY_LEFT | KEY_RIGHT to change speed", 10, 60, 10, RAYWHITE);
DrawText("Press KEY_SPACE to pause movement animation", 10, 75, 10, RAYWHITE);
}
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadShader(shader); // Unload shader
UnloadRenderTexture(target); // Unload render texture
UnloadShader(shader); // Unload shader
UnloadRenderTexture(target); // Unload render texture
CloseWindow(); // Close window and OpenGL context
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;

34
examples/shaders/shaders_postprocessing.c
View File

@@ -124,50 +124,38 @@ int main(void)
// Draw
//----------------------------------------------------------------------------------
BeginTextureMode(target); // Enable drawing to texture
ClearBackground(RAYWHITE); // Clear texture background
BeginMode3D(camera); // Begin 3d mode drawing
DrawModel(model, position, 0.1f, WHITE); // Draw 3d model with texture
DrawGrid(10, 1.0f); // Draw a grid
EndMode3D(); // End 3d mode drawing, returns to orthographic 2d mode
EndTextureMode(); // End drawing to texture (now we have a texture available for next passes)
BeginDrawing();
ClearBackground(RAYWHITE); // Clear screen background
ClearBackground(RAYWHITE);
BeginTextureMode(target); // Enable drawing to texture
ClearBackground(RAYWHITE); // Clear texture background
BeginMode3D(camera); // Begin 3d mode drawing
DrawModel(model, position, 0.1f, WHITE); // Draw 3d model with texture
DrawGrid(10, 1.0f); // Draw a grid
EndMode3D(); // End 3d mode drawing, returns to orthographic 2d mode
EndTextureMode(); // End drawing to texture (now we have a texture available for next passes)
// Render previously generated texture using selected postpro shader
// Render generated texture using selected postprocessing shader
BeginShaderMode(shaders[currentShader]);
// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
DrawTextureRec(target.texture, (Rectangle){ 0, 0, (float)target.texture.width, (float)-target.texture.height }, (Vector2){ 0, 0 }, WHITE);
EndShaderMode();
// Draw 2d shapes and text over drawn texture
DrawRectangle(0, 9, 580, 30, Fade(LIGHTGRAY, 0.7f));
DrawText("(c) Church 3D model by Alberto Cano", screenWidth - 200, screenHeight - 20, 10, GRAY);
DrawText("CURRENT POSTPRO SHADER:", 10, 15, 20, BLACK);
DrawText(postproShaderText[currentShader], 330, 15, 20, RED);
DrawText("< >", 540, 10, 30, DARKBLUE);
DrawFPS(700, 15);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
// Unload all postpro shaders
for (int i = 0; i < MAX_POSTPRO_SHADERS; i++) UnloadShader(shaders[i]);