From 895c7f1a06de2d89347909d62da41be9d62f0d09 Mon Sep 17 00:00:00 2001
From: jussi
Date: Wed, 12 Apr 2023 00:05:57 +0300
Subject: glBlitFramebuffer.

---
 src/gl.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 src/gl.c

(limited to 'src/gl.c')

diff --git a/src/gl.c b/src/gl.c
new file mode 100644
index 0000000..18947d5
--- /dev/null
+++ b/src/gl.c
@@ -0,0 +1,65 @@
+#include "main.h"
+#include "state.h"
+#include "lua_core.h"
+#include "textures.h"
+#include "lgl.h"
+
+/*
+## OpenGL - Framebuffer management
+*/
+
+/*
+> success = RL.glBlitFramebuffer( RenderTexture srcTex, RenderTexture dstTex, Rectangle srcRect, Rectangle dstRect, int mask, int filter )
+
+Copy a block of pixels from one framebuffer object to another.
+Use -1 RenderTexture for window framebuffer.
+
+- Failure return false
+- Success return true
+*/
+int lglBlitFramebuffer( lua_State *L ) {
+	if ( !lua_isnumber( L, 1) || !lua_isnumber( L, 2 ) || !lua_istable( L, 3 )
+	|| !lua_istable( L, 4 )	|| !lua_isnumber( L, 5 ) || !lua_isnumber( L, 6 ) ) {
+		TraceLog( LOG_WARNING, "%s", "Bad call of function. RL.glBlitFramebuffer( RenderTexture srcTex, RenderTexture dstTex, Rectangle srcRect, Rectangle dstRect, int mask, int filter )" );
+		lua_pushboolean( L, false );
+		return 1;
+	}
+	int srcTexId = lua_tointeger( L, 1 );
+	int dstTexId = lua_tointeger( L, 2 );
+	Rectangle srcRect = uluaGetRectangleIndex( L, 3 );
+	Rectangle dstRect = uluaGetRectangleIndex( L, 4 );
+	int mask = lua_tointeger( L, 5 );
+	int filter = lua_tointeger( L, 6 );
+
+	if ( ( !validRenderTexture( srcTexId ) && srcTexId != -1 ) && ( !validRenderTexture( dstTexId ) && dstTexId != -1 ) ) {
+		lua_pushboolean( L, false );
+		return 1;
+	}
+
+	if ( srcTexId == -1 ) {
+		glBindFramebuffer( GL_READ_FRAMEBUFFER, 0 );
+	}
+	else {
+		glBindFramebuffer( GL_READ_FRAMEBUFFER, state->renderTextures[ srcTexId ]->id );
+	}
+
+	if ( dstTexId == -1 ) {
+		glBindFramebuffer( GL_DRAW_FRAMEBUFFER, 0 );
+	}
+	else {
+		glBindFramebuffer( GL_DRAW_FRAMEBUFFER, state->renderTextures[ dstTexId ]->id );
+	}
+
+	glBlitFramebuffer(
+		srcRect.x, srcRect.y, srcRect.width, srcRect.height,
+		dstRect.x, dstRect.y, dstRect.width, dstRect.height,
+		mask,
+		filter
+		// GL_COLOR_BUFFER_BIT, 									// mask
+		// GL_NEAREST												// filter
+	);
+
+	lua_pushboolean( L, true );
+
+	return 1;
+}
\ No newline at end of file
-- 
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