diff options
Diffstat (limited to 'src/render.c')
| -rw-r--r-- | src/render.c | 138 |
1 files changed, 103 insertions, 35 deletions
diff --git a/src/render.c b/src/render.c index b19abcd..a5d0d51 100644 --- a/src/render.c +++ b/src/render.c @@ -4,10 +4,51 @@ * All rights reserved.
*/
-inline void render_clear()
+static platform_window *drawing_window = 0;
+
+// returns topleft and bottomright corners. not width + height
+static vec4 _get_actual_rect(s32 x, s32 y, s32 width, s32 height)
{
- glClearColor(255/255.0, 255/255.0, 255/255.0, 1.0);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ if (x < 0) x = 0;
+ if (y < 0) y = 0;
+ s32 start_x = x;
+ s32 start_y = y;
+ s32 end_x = start_x + width;
+ s32 end_y = start_y + height;
+ if (end_x > drawing_window->backbuffer.width)
+ end_x = drawing_window->backbuffer.width;
+ if (end_y > drawing_window->backbuffer.height)
+ end_y = drawing_window->backbuffer.height;
+
+ if (start_x < current_scissor.x) start_x = current_scissor.x;
+ if (start_y < current_scissor.y) start_y = current_scissor.y;
+ if (end_x > current_scissor.x+current_scissor.w)
+ end_x = current_scissor.x+current_scissor.w;
+ if (end_y > current_scissor.y+current_scissor.h)
+ end_y = current_scissor.y+current_scissor.h;
+
+ return (vec4){start_x,start_y,end_x,end_y};
+}
+
+inline void render_clear(platform_window *window)
+{
+ if (global_use_gpu)
+ {
+ glClearColor(255/255.0, 255/255.0, 255/255.0, 1.0);
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ }
+ else
+ {
+ drawing_window = window;
+ render_reset_scissor();
+
+ render_depth = 1;
+
+ u8 pixel[5] = { 0xFF, 0xFF, 0xFF, 0xFF, 0x00 };
+ s32 pixel_count = window->backbuffer.width*window->backbuffer.height;
+ for (s32 i = 0; i < pixel_count; i++)
+ memcpy(window->backbuffer.buffer+(i*5), pixel, 5);
+ }
}
inline void render_set_rotation(float32 rotation, float32 x, float32 y, s32 depth)
@@ -530,27 +571,33 @@ void render_triangle(s32 x, s32 y, s32 w, s32 h, color tint, triangle_direction void render_rectangle(s32 x, s32 y, s32 width, s32 height, color tint)
{
- glBegin(GL_QUADS);
- glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f);
- glVertex3i(x, y, render_depth);
- glVertex3i(x, y+height, render_depth);
- glVertex3i(x+width, y+height, render_depth);
- glVertex3i(x+width, y, render_depth);
- glEnd();
-}
-
-void render_rectangle_tint(s32 x, s32 y, s32 width, s32 height, color tint[4])
-{
- glBegin(GL_QUADS);
- glColor4f(tint[0].r/255.0f, tint[0].g/255.0f, tint[0].b/255.0f, tint[0].a/255.0f);
- glVertex3i(x, y, render_depth);
- glColor4f(tint[1].r/255.0f, tint[1].g/255.0f, tint[1].b/255.0f, tint[1].a/255.0f);
- glVertex3i(x, y+height, render_depth);
- glColor4f(tint[2].r/255.0f, tint[2].g/255.0f, tint[2].b/255.0f, tint[2].a/255.0f);
- glVertex3i(x+width, y+height, render_depth);
- glColor4f(tint[3].r/255.0f, tint[3].g/255.0f, tint[3].b/255.0f, tint[3].a/255.0f);
- glVertex3i(x+width, y, render_depth);
- glEnd();
+ if (global_use_gpu)
+ {
+ glBegin(GL_QUADS);
+ glColor4f(tint.r/255.0f, tint.g/255.0f, tint.b/255.0f, tint.a/255.0f);
+ glVertex3i(x, y, render_depth);
+ glVertex3i(x, y+height, render_depth);
+ glVertex3i(x+width, y+height, render_depth);
+ glVertex3i(x+width, y, render_depth);
+ glEnd();
+ }
+ else
+ {
+ vec4 rec = _get_actual_rect(x,y,width,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;
+ memcpy(buffer_entry, &tint, 4);
+ }
+ }
+ }
}
void render_rectangle_outline(s32 x, s32 y, s32 width, s32 height, u16 outline_w, color tint)
@@ -567,22 +614,43 @@ void render_rectangle_outline(s32 x, s32 y, s32 width, s32 height, u16 outline_w void render_set_scissor(platform_window *window, s32 x, s32 y, s32 w, s32 h)
{
- glEnable(GL_SCISSOR_TEST);
- glScissor(x-1, window->height-h-y-1, w+1, h+1);
+ if (global_use_gpu)
+ {
+ glEnable(GL_SCISSOR_TEST);
+ glScissor(x-1, window->height-h-y-1, w+1, h+1);
+ }
+ else
+ {
+ current_scissor = (vec4){x,y,w,h};
+ }
}
vec4 render_get_scissor(platform_window *window)
{
- vec4 vec;
- glGetIntegerv(GL_SCISSOR_BOX, (GLint*)(&vec));
- vec.x += 1;
- vec.w -= 1;
- vec.h -= 1;
- vec.y += 1;
- return vec;
+ if (global_use_gpu)
+ {
+ vec4 vec;
+ glGetIntegerv(GL_SCISSOR_BOX, (GLint*)(&vec));
+ vec.x += 1;
+ vec.w -= 1;
+ vec.h -= 1;
+ vec.y += 1;
+ return vec;
+ }
+ else
+ {
+ return current_scissor;
+ }
}
void render_reset_scissor()
{
- glDisable(GL_SCISSOR_TEST);
-}
\ No newline at end of file + if (global_use_gpu)
+ {
+ glDisable(GL_SCISSOR_TEST);
+ }
+ else
+ {
+ current_scissor = (vec4){0,0,drawing_window->width,drawing_window->height};
+ }
+}
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