cpu rendering working

1 files changed, 351 insertions, 90 deletions

diff --git a/src/render.c b/src/render.c
index a5d0d51..bd14a37 100644
--- a/src/render.c
+++ b/src/render.c
@@ -64,19 +64,59 @@ inline void set_render_depth(s32 depth)
 void render_image(image *image, s32 x, s32 y, s32 width, s32 height)

 {

 	assert(image);

-	if (image->loaded)

+	

+	if (global_use_gpu)

 	{

-		glBindTexture(GL_TEXTURE_2D, image->textureID);

-		glEnable(GL_TEXTURE_2D);

-		glBegin(GL_QUADS);

-		glColor4f(1., 1., 1., 1.);

-		glTexCoord2i(0, 0); glVertex3i(x, y, render_depth);

-		glTexCoord2i(0, 1); glVertex3i(x, y+height, render_depth);

-		glTexCoord2i(1, 1); glVertex3i(x+width, y+height, render_depth);

-		glTexCoord2i(1, 0); glVertex3i(x+width, y, render_depth);

-		glEnd();

-		

-		glDisable(GL_TEXTURE_2D);

+		if (image->loaded)

+		{

+			glBindTexture(GL_TEXTURE_2D, image->textureID);

+			glEnable(GL_TEXTURE_2D);

+			glBegin(GL_QUADS);

+			glColor4f(1., 1., 1., 1.);

+			glTexCoord2i(0, 0); glVertex3i(x, y, render_depth);

+			glTexCoord2i(0, 1); glVertex3i(x, y+height, render_depth);

+			glTexCoord2i(1, 1); glVertex3i(x+width, y+height, render_depth);

+			glTexCoord2i(1, 0); glVertex3i(x+width, y, render_depth);

+			glEnd();

+			

+			glDisable(GL_TEXTURE_2D);

+		}

+	}

+	else

+	{

+		if (image->loaded)

+		{

+			vec4 rec = _get_actual_rect(x, y, image->width, image->height);

+			

+			for (s32 x = rec.x; x < rec.w; x++)

+			{

+				for (s32 y = rec.y; y < rec.h; y++)

+				{

+					s32 offset = (y * (drawing_window->backbuffer.width) * 5) + x * 5;

+					u8 *buffer_entry = drawing_window->backbuffer.buffer+offset;

+					

+					if (buffer_entry[4] > render_depth) continue;

+					buffer_entry[4] = render_depth;

+					

+					s32 _x = x - rec.x;

+					s32 _y = y - rec.y;

+					s32 image_offset = (_y * (image->width) * 4) + _x * 4;

+					u8 *color = image->data+image_offset;

+					

+					float32 alpha = color[3] / 255.0f;

+					float32 oneminusalpha = 1 - alpha;

+					

+					u8 b = ((color[0] * alpha) + (oneminusalpha * buffer_entry[0]));

+					u8 g = ((color[1] * alpha) + (oneminusalpha * buffer_entry[1]));

+					u8 r = ((color[2] * alpha) + (oneminusalpha * buffer_entry[2]));

+					u8 a = color[3];

+					

+					s32 c = (a << 24) | (r << 16) | (g << 8) | (b << 0);

+					

+					memcpy(buffer_entry, &c, 4);

+				}

+			}

+		}

 	}

 }

 

@@ -85,17 +125,24 @@ void render_image_tint(image *image, s32 x, s32 y, s32 width, s32 height, color
 	assert(image);

 	if (image->loaded)

 	{

-		glBindTexture(GL_TEXTURE_2D, image->textureID);

-		glEnable(GL_TEXTURE_2D);

-		glBegin(GL_QUADS);

-		glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

-		glTexCoord2i(0, 0); glVertex3i(x, y, render_depth);

-		glTexCoord2i(0, 1); glVertex3i(x, y+height, render_depth);

-		glTexCoord2i(1, 1); glVertex3i(x+width, y+height, render_depth);

-		glTexCoord2i(1, 0); glVertex3i(x+width, y, render_depth);

-		glEnd();

-		

-		glDisable(GL_TEXTURE_2D);

+		if (global_use_gpu)

+		{

+			glBindTexture(GL_TEXTURE_2D, image->textureID);

+			glEnable(GL_TEXTURE_2D);

+			glBegin(GL_QUADS);

+			glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+			glTexCoord2i(0, 0); glVertex3i(x, y, render_depth);

+			glTexCoord2i(0, 1); glVertex3i(x, y+height, render_depth);

+			glTexCoord2i(1, 1); glVertex3i(x+width, y+height, render_depth);

+			glTexCoord2i(1, 0); glVertex3i(x+width, y, render_depth);

+			glEnd();

+			

+			glDisable(GL_TEXTURE_2D);

+		}

+		else

+		{

+			assert(0 && "not implemented");

+		}

 	}

 }

 

@@ -104,8 +151,11 @@ s32 render_text_ellipsed(font *font, s32 x, s32 y, s32 maxw, char *text, color t
 	if (!font->loaded)

 		return 0;

 	

-	glEnable(GL_TEXTURE_2D);

-	glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	if (global_use_gpu)

+	{

+		glEnable(GL_TEXTURE_2D);

+		glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	}

 	

 	char *ellipse = "...";

 	bool in_ellipse = false;

@@ -129,20 +179,56 @@ s32 render_text_ellipsed(font *font, s32 x, s32 y, s32 maxw, char *text, color t
 		

 		glyph g = font->glyphs[ch];

 		

-		glBindTexture(GL_TEXTURE_2D, g.textureID);

-		glBegin(GL_QUADS);

-		

-		s32 width = g.width;

-		

 		s32 y_ = y + font->px_h + g.yoff;

 		s32 x_to_render = x_ + (g.lsb);

 		

-		glTexCoord2i(0, 0); glVertex3i(x_to_render,y_, render_depth);

-		glTexCoord2i(0, 1); glVertex3i(x_to_render,y_+g.height, render_depth);

-		glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y_+g.height, render_depth);

-		glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y_, render_depth);

-		

-		glEnd();

+		if (global_use_gpu)

+		{

+			glBindTexture(GL_TEXTURE_2D, g.textureID);

+			glBegin(GL_QUADS);

+			

+			s32 width = g.width;

+			

+			glTexCoord2i(0, 0); glVertex3i(x_to_render,y_, render_depth);

+			glTexCoord2i(0, 1); glVertex3i(x_to_render,y_+g.height, render_depth);

+			glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y_+g.height, render_depth);

+			glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y_, render_depth);

+			

+			glEnd();

+		}

+		else

+		{

+			vec4 rec = _get_actual_rect(x_to_render, y_, g.width, g.height);

+			

+			for (s32 x = rec.x; x < rec.w; x++)

+			{

+				for (s32 y = rec.y; y < rec.h; y++)

+				{

+					s32 offset = (y * (drawing_window->backbuffer.width) * 5) + x * 5;

+					u8 *buffer_entry = drawing_window->backbuffer.buffer+offset;

+					

+					if (buffer_entry[4] > render_depth) continue;

+					buffer_entry[4] = render_depth;

+					

+					s32 _x = x - rec.x;

+					s32 _y = y - rec.y;

+					s32 image_offset = (_y * g.width) + _x;

+					u8 *color = g.bitmap+image_offset;

+					

+					float32 alpha = color[0] / 255.0f;

+					float32 oneminusalpha = 1 - alpha;

+					

+					u8 r = ((tint.r * alpha) + (oneminusalpha * buffer_entry[0]));

+					u8 g = ((tint.g * alpha) + (oneminusalpha * buffer_entry[1]));

+					u8 b = ((tint.b * alpha) + (oneminusalpha * buffer_entry[2]));

+					u8 a = color[0];

+					

+					s32 c = (a << 24) | (r << 16) | (g << 8) | (b << 0);

+					

+					memcpy(buffer_entry, &c, 4);

+				}

+			}

+		}

 		

 		/* add kerning */

 		//kern = stbtt_GetCodepointKernAdvance(&font->info, ch, ch_next);

@@ -155,7 +241,8 @@ s32 render_text_ellipsed(font *font, s32 x, s32 y, s32 maxw, char *text, color t
 		}

 	}

 	

-	glDisable(GL_TEXTURE_2D);

+	if (global_use_gpu)

+		glDisable(GL_TEXTURE_2D);

 	

 	return maxw;

 }

@@ -165,8 +252,11 @@ s32 render_text_with_selection(font *font, s32 x, s32 y, char *text, color tint,
 	if (!font->loaded)

 		return 0;

 	

-	glEnable(GL_TEXTURE_2D);

-	glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	if (global_use_gpu)

+	{

+		glEnable(GL_TEXTURE_2D);

+		glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	}

 	

 	s32 x_ = x;

 	utf8_int32_t ch;

@@ -186,20 +276,56 @@ s32 render_text_with_selection(font *font, s32 x, s32 y, char *text, color tint,
 		

 		glyph g = font->glyphs[ch];

 		

-		glBindTexture(GL_TEXTURE_2D, g.textureID);

-		glBegin(GL_QUADS);

-		

-		s32 width = g.width;

-		

 		s32 y_ = y + font->px_h + g.yoff;

 		s32 x_to_render = x_ + (g.lsb);

 		

-		glTexCoord2i(0, 0); glVertex3i(x_to_render,y_, render_depth);

-		glTexCoord2i(0, 1); glVertex3i(x_to_render,y_+g.height, render_depth);

-		glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y_+g.height, render_depth);

-		glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y_, render_depth);

-		

-		glEnd();

+		if (global_use_gpu)

+		{

+			glBindTexture(GL_TEXTURE_2D, g.textureID);

+			glBegin(GL_QUADS);

+			

+			s32 width = g.width;

+			

+			glTexCoord2i(0, 0); glVertex3i(x_to_render,y_, render_depth);

+			glTexCoord2i(0, 1); glVertex3i(x_to_render,y_+g.height, render_depth);

+			glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y_+g.height, render_depth);

+			glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y_, render_depth);

+			

+			glEnd();

+		}

+		else

+		{

+			vec4 rec = _get_actual_rect(x_to_render, y_, g.width, g.height);

+			

+			for (s32 x = rec.x; x < rec.w; x++)

+			{

+				for (s32 y = rec.y; y < rec.h; y++)

+				{

+					s32 offset = (y * (drawing_window->backbuffer.width) * 5) + x * 5;

+					u8 *buffer_entry = drawing_window->backbuffer.buffer+offset;

+					

+					if (buffer_entry[4] > render_depth) continue;

+					buffer_entry[4] = render_depth;

+					

+					s32 _x = x - rec.x;

+					s32 _y = y - rec.y;

+					s32 image_offset = (_y * g.width) + _x;

+					u8 *color = g.bitmap+image_offset;

+					

+					float32 alpha = color[0] / 255.0f;

+					float32 oneminusalpha = 1 - alpha;

+					

+					u8 r = ((tint.r * alpha) + (oneminusalpha * buffer_entry[0]));

+					u8 g = ((tint.g * alpha) + (oneminusalpha * buffer_entry[1]));

+					u8 b = ((tint.b * alpha) + (oneminusalpha * buffer_entry[2]));

+					u8 a = color[0];

+					

+					s32 c = (a << 24) | (r << 16) | (g << 8) | (b << 0);

+					

+					memcpy(buffer_entry, &c, 4);

+				}

+			}

+		}

 		

 		/* add kerning */

 		//kern = stbtt_GetCodepointKernAdvance(&font->info, ch, ch_next);

@@ -216,7 +342,8 @@ s32 render_text_with_selection(font *font, s32 x, s32 y, char *text, color tint,
 		}

 	}

 	

-	glDisable(GL_TEXTURE_2D);

+	if (global_use_gpu)

+		glDisable(GL_TEXTURE_2D);

 	

 	render_rectangle(selection_start_x, y-3, selection_end_x-selection_start_x, TEXTBOX_HEIGHT - 10, rgba(66, 134, 244, 120));

 	

@@ -228,8 +355,11 @@ s32 render_text_with_cursor(font *font, s32 x, s32 y, char *text, color tint, s3
 	if (!font->loaded)

 		return 0;

 	

-	glEnable(GL_TEXTURE_2D);

-	glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	if (global_use_gpu)

+	{

+		glEnable(GL_TEXTURE_2D);

+		glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	}

 	

 	float x_ = x;

 	utf8_int32_t ch;

@@ -248,18 +378,54 @@ s32 render_text_with_cursor(font *font, s32 x, s32 y, char *text, color tint, s3
 		

 		glyph g = font->glyphs[ch];

 		

-		glBindTexture(GL_TEXTURE_2D, g.textureID);

-		glBegin(GL_QUADS);

-		

 		s32 y_ = y + font->px_h + g.yoff;

 		s32 x_to_render = x_ + (g.lsb);

 		

-		glTexCoord2i(0, 0); glVertex3i(x_to_render,y_, render_depth);

-		glTexCoord2i(0, 1); glVertex3i(x_to_render,y_+g.height, render_depth);

-		glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y_+g.height, render_depth);

-		glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y_, render_depth);

-		

-		glEnd();

+		if (global_use_gpu)

+		{

+			glBindTexture(GL_TEXTURE_2D, g.textureID);

+			glBegin(GL_QUADS);

+			

+			glTexCoord2i(0, 0); glVertex3i(x_to_render,y_, render_depth);

+			glTexCoord2i(0, 1); glVertex3i(x_to_render,y_+g.height, render_depth);

+			glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y_+g.height, render_depth);

+			glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y_, render_depth);

+			

+			glEnd();

+		}

+		else

+		{

+			vec4 rec = _get_actual_rect(x_to_render, y_, g.width, g.height);

+			

+			for (s32 x = rec.x; x < rec.w; x++)

+			{

+				for (s32 y = rec.y; y < rec.h; y++)

+				{

+					s32 offset = (y * (drawing_window->backbuffer.width) * 5) + x * 5;

+					u8 *buffer_entry = drawing_window->backbuffer.buffer+offset;

+					

+					if (buffer_entry[4] > render_depth) continue;

+					buffer_entry[4] = render_depth;

+					

+					s32 _x = x - rec.x;

+					s32 _y = y - rec.y;

+					s32 image_offset = (_y * g.width) + _x;

+					u8 *color = g.bitmap+image_offset;

+					

+					float32 alpha = color[0] / 255.0f;

+					float32 oneminusalpha = 1 - alpha;

+					

+					u8 r = ((tint.r * alpha) + (oneminusalpha * buffer_entry[0]));

+					u8 g = ((tint.g * alpha) + (oneminusalpha * buffer_entry[1]));

+					u8 b = ((tint.b * alpha) + (oneminusalpha * buffer_entry[2]));

+					u8 a = color[0];

+					

+					s32 c = (a << 24) | (r << 16) | (g << 8) | (b << 0);

+					

+					memcpy(buffer_entry, &c, 4);

+				}

+			}

+		}

 		

 		/* add kerning */

 		//kern = stbtt_GetCodepointKernAdvance(&font->info, ch, ch_next);

@@ -271,7 +437,9 @@ s32 render_text_with_cursor(font *font, s32 x, s32 y, char *text, color tint, s3
 			cursor_x = x_;

 		}

 	}

-	glDisable(GL_TEXTURE_2D);

+	

+	if (global_use_gpu)

+		glDisable(GL_TEXTURE_2D);

 	

 	render_rectangle(cursor_x, y-3, 2, TEXTBOX_HEIGHT - 10, global_ui_context.style.textbox_foreground);

 	

@@ -283,8 +451,11 @@ s32 render_text(font *font, s32 x, s32 y, char *text, color tint)
 	if (!font->loaded)

 		return 0;

 	

-	glEnable(GL_TEXTURE_2D);

-	glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	if (global_use_gpu)

+	{

+		glEnable(GL_TEXTURE_2D);

+		glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	}

 	

 	s32 x_ = x;

 	utf8_int32_t ch;

@@ -302,25 +473,64 @@ s32 render_text(font *font, s32 x, s32 y, char *text, color tint)
 		

 		glyph g = font->glyphs[ch];

 		

-		glBindTexture(GL_TEXTURE_2D, g.textureID);

-		glBegin(GL_QUADS);

-		

 		s32 y_ = y + font->px_h + g.yoff;

 		s32 x_to_render = x_ + (g.lsb);

 		

-		glTexCoord2i(0, 0); glVertex3i(x_to_render,y_, render_depth);

-		glTexCoord2i(0, 1); glVertex3i(x_to_render,y_+g.height, render_depth);

-		glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y_+g.height, render_depth);

-		glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y_, render_depth);

-		

-		glEnd();

+		if (global_use_gpu)

+		{

+			glBindTexture(GL_TEXTURE_2D, g.textureID);

+			glBegin(GL_QUADS);

+			

+			glTexCoord2i(0, 0); glVertex3i(x_to_render,y_, render_depth);

+			glTexCoord2i(0, 1); glVertex3i(x_to_render,y_+g.height, render_depth);

+			glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y_+g.height, render_depth);

+			glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y_, render_depth);

+			

+			glEnd();

+		}

+		else

+		{

+			vec4 rec = _get_actual_rect(x_to_render, y_, g.width, g.height);

+			

+			for (s32 x = rec.x; x < rec.w; x++)

+			{

+				for (s32 y = rec.y; y < rec.h; y++)

+				{

+					s32 offset = (y * (drawing_window->backbuffer.width) * 5) + x * 5;

+					u8 *buffer_entry = drawing_window->backbuffer.buffer+offset;

+					

+					if (buffer_entry[4] > render_depth) continue;

+					buffer_entry[4] = render_depth;

+					

+					s32 _x = x - rec.x;

+					s32 _y = y - rec.y;

+					s32 image_offset = (_y * g.width) + _x;

+					u8 *color = g.bitmap+image_offset;

+					

+					if (color[0] == 0) continue;

+					

+					float32 alpha = color[0] / 255.0f;

+					float32 oneminusalpha = 1 - alpha;

+					

+					u8 r = ((tint.r * alpha) + (oneminusalpha * buffer_entry[0]));

+					u8 g = ((tint.g * alpha) + (oneminusalpha * buffer_entry[1]));

+					u8 b = ((tint.b * alpha) + (oneminusalpha * buffer_entry[2]));

+					u8 a = color[0];

+					

+					s32 c = (a << 24) | (r << 16) | (g << 8) | (b << 0);

+					

+					memcpy(buffer_entry, &c, 4);

+				}

+			}

+		}

 		

 		/* add kerning */

 		//kern = stbtt_GetCodepointKernAdvance(&font->info, ch, ch_next);

 		x_ += (g.advance);

 	}

 	

-	glDisable(GL_TEXTURE_2D);

+	if (global_use_gpu)

+		glDisable(GL_TEXTURE_2D);

 	

 	return x_ - x;

 }

@@ -330,8 +540,11 @@ s32 render_text_cutoff(font *font, s32 x, s32 y, char *text, color tint, u16 cut
 	if (!font->loaded)

 		return 0;

 	

-	glEnable(GL_TEXTURE_2D);

-	glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	if (global_use_gpu)

+	{

+		glEnable(GL_TEXTURE_2D);

+		glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f); 

+	}

 	

 	s32 x_ = x;

 	s32 y_ = y;

@@ -368,18 +581,54 @@ s32 render_text_cutoff(font *font, s32 x, s32 y, char *text, color tint, u16 cut
 		

 		glyph g = font->glyphs[ch];

 		

-		glBindTexture(GL_TEXTURE_2D, g.textureID);

-		glBegin(GL_QUADS);

-		

 		s32 y__ = y_ + font->px_h + g.yoff;

 		s32 x_to_render = x_ + (g.lsb);

 		

-		glTexCoord2i(0, 0); glVertex3i(x_to_render,y__, render_depth);

-		glTexCoord2i(0, 1); glVertex3i(x_to_render,y__+g.height, render_depth);

-		glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y__+g.height, render_depth);

-		glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y__, render_depth);

-		

-		glEnd();

+		if (global_use_gpu)

+		{

+			glBindTexture(GL_TEXTURE_2D, g.textureID);

+			glBegin(GL_QUADS);

+			

+			glTexCoord2i(0, 0); glVertex3i(x_to_render,y__, render_depth);

+			glTexCoord2i(0, 1); glVertex3i(x_to_render,y__+g.height, render_depth);

+			glTexCoord2i(1, 1); glVertex3i(x_to_render+g.width,y__+g.height, render_depth);

+			glTexCoord2i(1, 0); glVertex3i(x_to_render+g.width,y__, render_depth);

+			

+			glEnd();

+		}

+		else

+		{

+			vec4 rec = _get_actual_rect(x_to_render, y__, g.width, g.height);

+			

+			for (s32 x = rec.x; x < rec.w; x++)

+			{

+				for (s32 y = rec.y; y < rec.h; y++)

+				{

+					s32 offset = (y * (drawing_window->backbuffer.width) * 5) + x * 5;

+					u8 *buffer_entry = drawing_window->backbuffer.buffer+offset;

+					

+					if (buffer_entry[4] > render_depth) continue;

+					buffer_entry[4] = render_depth;

+					

+					s32 _x = x - rec.x;

+					s32 _y = y - rec.y;

+					s32 image_offset = (_y * g.width) + _x;

+					u8 *color = g.bitmap+image_offset;

+					

+					float32 alpha = color[0] / 255.0f;

+					float32 oneminusalpha = 1 - alpha;

+					

+					u8 r = ((tint.r * alpha) + (oneminusalpha * buffer_entry[0]));

+					u8 g = ((tint.g * alpha) + (oneminusalpha * buffer_entry[1]));

+					u8 b = ((tint.b * alpha) + (oneminusalpha * buffer_entry[2]));

+					u8 a = color[0];

+					

+					s32 c = (a << 24) | (r << 16) | (g << 8) | (b << 0);

+					

+					memcpy(buffer_entry, &c, 4);

+				}

+			}

+		}

 		

 		/* add kerning */

 		//kern = stbtt_GetCodepointKernAdvance(&font->info, ch, ch_next);

@@ -393,7 +642,8 @@ s32 render_text_cutoff(font *font, s32 x, s32 y, char *text, color tint, u16 cut
 		}

 	}

 	

-	glDisable(GL_TEXTURE_2D);

+	if (global_use_gpu)

+		glDisable(GL_TEXTURE_2D);

 	

 	return (y_ - y) + font->size;

 	

@@ -594,7 +844,18 @@ void render_rectangle(s32 x, s32 y, s32 width, s32 height, color tint)
 				

 				if (buffer_entry[4] > render_depth) continue;

 				buffer_entry[4] = render_depth;

-				memcpy(buffer_entry, &tint, 4);

+				

+				float32 alpha = tint.a / 255.0f;

+				float32 oneminusalpha = 1 - alpha;

+				

+				u8 r = ((tint.r * alpha) + (oneminusalpha * buffer_entry[0]));

+				u8 g = ((tint.g * alpha) + (oneminusalpha * buffer_entry[1]));

+				u8 b = ((tint.b * alpha) + (oneminusalpha * buffer_entry[2]));

+				u8 a = tint.a;

+				

+				s32 c = (a << 24) | (r << 16) | (g << 8) | (b << 0);

+				

+				memcpy(buffer_entry, &c, 4);

 			}

 		}

 	}

@@ -621,7 +882,7 @@ void render_set_scissor(platform_window *window, s32 x, s32 y, s32 w, s32 h)
 	}

 	else

 	{

-		current_scissor = (vec4){x,y,w,h};

+		current_scissor = (vec4){x,y,w+1,h+1};

 	}

 }

 

@@ -651,6 +912,6 @@ void render_reset_scissor()
 	}

 	else

 	{

-		current_scissor = (vec4){0,0,drawing_window->width,drawing_window->height};

+		current_scissor = (vec4){0,0,drawing_window->width+1,drawing_window->height+1};

 	}

 }