{lib, drivers/intel}: Move BMP rendering logic out of SoC code

This patch refactors the BMP rendering logic, moving it from
drivers/intel/fsp2_0 to src/lib. This centralizes the code
responsible for rendering BMP images to the framebuffer.

Key changes:
- Move BMP rendering functions (e.g., calculate_logo_coordinates,
  copy_logo_to_framebuffer) and their dependencies to
  src/lib/render_bmp.c and src/lib/render_bmp.h.
- Decouple BMP definitions from UEFI headers by introducing new
  coreboot-specific structures for BMP images and BLT pixels.
- Consolidate bootsplash-related declarations into bootsplash.h,
  including new `fw_splash_vertical_alignment`,
  `fw_splash_horizontal_alignment`, and `struct logo_config`.
- Update `soc_load_logo_by_coreboot` to use the new common
  `load_and_render_logo_to_framebuffer` function and `struct
  logo_config` for rendering.
- Relocate `release_logo` to `src/lib/render_bmp.c` for better
  module structure.
- Update `src/lib/Makefile.mk` to include the new render_bmp.c.

This refactoring improves code organization and reusability, making
BMP rendering accessible without tight coupling to Intel-specific
driver code.

BUG=b:427387842
TEST=Verify firmware splash screen on google/fatcat.

Change-Id: I0e20ea7e44b4b3ccdb2d4aa9b6aa10ed3447ccfc
Signed-off-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88361
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/bootsplash.h

@@ -3,6 +3,7 @@
 #ifndef __BOOTSPLASH_H__
 #define __BOOTSPLASH_H__
 
+#include <boot/coreboot_tables.h>
 #include <types.h>
 
 enum bootsplash_type {
@@ -27,6 +28,125 @@ void set_bootsplash(unsigned char *framebuffer, unsigned int x_resolution,
 		    unsigned int y_resolution, unsigned int bytes_per_line,
 		    unsigned int fb_resolution);
 
+/*
+ * Specifies the vertical alignment for the splash screen image.
+ *
+ * Visual Guide (representing the display area and the [LOGO]):
+ *
+ * Each option dictates the vertical placement of the splash image
+ * within the display's height.
+ */
+enum fw_splash_vertical_alignment {
+	/*
+	 * The splash image is centered vertically `(Y-axis - logo_height)/2` on the screen.
+	 * The center of the [LOGO] aligns with the vertical center of the screen.
+	 *
+	 * +---------------+
+	 * |               |
+	 * |               |
+	 * |    [LOGO]     |  <-- Vertically Centered
+	 * |               |
+	 * |               |
+	 * +---------------+
+	 */
+	FW_SPLASH_VALIGNMENT_CENTER = 0,
+
+	/*
+	 * The splash image is aligned to the top edge of the screen.
+	 *
+	 * +---------------+
+	 * |    [LOGO]     |  <-- Top Aligned
+	 * |               |
+	 * |               |
+	 * |               |
+	 * |               |
+	 * +---------------+
+	 */
+	FW_SPLASH_VALIGNMENT_TOP = 1,
+
+	/*
+	 * The splash image is aligned to the bottom edge of the screen.
+	 *
+	 * +---------------+
+	 * |               |
+	 * |               |
+	 * |               |
+	 * |               |
+	 * |    [LOGO]     |  <-- Bottom Aligned
+	 * +---------------+
+	 */
+	FW_SPLASH_VALIGNMENT_BOTTOM = 2,
+
+	/*
+	 * The splash image is placed in the vertical middle `(Y-axis/2)` of the screen
+	 * (without considering the `logo height`). This means the TOP EDGE of the
+	 * [LOGO] aligns with the screen's vertical midpoint line.
+	 *
+	 * +---------------+
+	 * | (Upper Half)  |
+	 * |               |
+	 * |    [LOGO]     | <-- [LOGO] aligns at Middle of the Y-axis
+	 * |               |
+	 * | (Lower Half)  |
+	 * +---------------+
+	 *
+	 * Note: The distinction between CENTER and MIDDLE is relevant as in for MIDDLE
+	 * alignment, it ignores the logo height (i.e., the logo's top edge is placed
+	 * at the screen's Y-midpoint). CENTER alignment, by contrast, would place
+	 * the geometrical center of the logo at the screen's Y-midpoint.
+	 */
+	FW_SPLASH_VALIGNMENT_MIDDLE = 3,
+};
+
+enum fw_splash_horizontal_alignment {
+	/*
+	 * The splash image is centered horizontally `(X-axis - logo_width)/2` on the screen.
+	 * The center of the [LOGO] aligns with the horizontal center of the screen.
+	 *
+	 * +-----------------+
+	 * |      [LOGO]     |
+	 * +-----------------+
+	 */
+	FW_SPLASH_HALIGNMENT_CENTER = 0,
+
+	/*
+	 * The splash image is aligned to the left edge of the screen.
+	 *
+	 * +-----------------+
+	 * |[LOGO]           |
+	 * +-----------------+
+	 */
+	FW_SPLASH_HALIGNMENT_LEFT = 1,
+
+	/*
+	 * The splash image is aligned to the right edge of the screen.
+	 *
+	 * +-----------------+
+	 * |           [LOGO]|
+	 * +-----------------+
+	 */
+	FW_SPLASH_HALIGNMENT_RIGHT = 2,
+};
+
+struct logo_config {
+	uintptr_t framebuffer_base;
+	uint32_t horizontal_resolution;
+	uint32_t vertical_resolution;
+	uint32_t bytes_per_scanline;
+	enum lb_fb_orientation panel_orientation;
+	enum fw_splash_horizontal_alignment halignment;
+	enum fw_splash_vertical_alignment valignment;
+	uint8_t logo_bottom_margin;
+};
+
+void render_logo_to_framebuffer(struct logo_config *config);
+void load_and_convert_bmp_to_blt(uintptr_t *logo, size_t *logo_size,
+	uintptr_t *blt, size_t *blt_size, uint32_t *pixel_height, uint32_t *pixel_width,
+	enum lb_fb_orientation orientation);
+void convert_bmp_to_blt(uintptr_t logo, size_t logo_size,
+	uintptr_t *blt, size_t *blt_size, uint32_t *pixel_height, uint32_t *pixel_width,
+	enum lb_fb_orientation orientation);
+
 /*
  * Allow platform-specific BMP logo overrides via HAVE_CUSTOM_BMP_LOGO config.
  * For example: Introduce configurable BMP logo for customization on platforms like ChromeOS